20841660

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{139}}^1$

素因数の和:185

約数の個数: 216

約数和(自身を含む): 78427440

約数和(自身を除く): 57585780

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 17, 18, 20, 21, 28, 30, 34, 35, 36, 42, 45, 49, 51, 60, 63, 68, 70, 84, 85, 90, 98, 102, 105, 119, 126, 139, 140, 147, 153, 170, 180, 196, 204, 210, 238, 245, 252, 255, 278, 294, 306, 315, 340, 357, 417, 420, 441, 476, 490, 510, 556, 588, 595, 612, 630, 695, 714, 735, 765, 833, 834, 882, 973, 980, 1020, 1071, 1190, 1251, 1260, 1390, 1428, 1470, 1530, 1666, 1668, 1764, 1785, 1946, 2085, 2142, 2205, 2363, 2380, 2499, 2502, 2780, 2919, 2940, 3060, 3332, 3570, 3892, 4165, 4170, 4284, 4410, 4726, 4865, 4998, 5004, 5355, 5838, 6255, 6811, 7089, 7140, 7497, 8330, 8340, 8757, 8820, 9452, 9730, 9996, 10710, 11676, 11815, 12495, 12510, 13622, 14178, 14595, 14994, 16541, 16660, 17514, 19460, 20433, 21267, 21420, 23630, 24990, 25020, 27244, 28356, 29190, 29988, 33082, 34055, 35028, 35445, 37485, 40866, 42534, 43785, 47260, 49623, 49980, 58380, 61299, 66164, 68110, 70890, 74970, 81732, 82705, 85068, 87570, 99246, 102165, 106335, 115787, 122598, 136220, 141780, 148869, 149940, 165410, 175140, 198492, 204330, 212670, 231574, 245196, 248115, 297738, 306495, 330820, 347361, 408660, 425340, 463148, 496230, 578935, 595476, 612990, 694722, 744345, 992460, 1042083, 1157870, 1225980, 1389444, 1488690, 1736805, 2084166, 2315740, 2977380, 3473610, 4168332, 5210415, 6947220, 10420830, 20841660]

約数ペア:

[(1, 20841660), (2, 10420830), (3, 6947220), (4, 5210415), (5, 4168332), (6, 3473610), (7, 2977380), (9, 2315740), (10, 2084166), (12, 1736805), (14, 1488690), (15, 1389444), (17, 1225980), (18, 1157870), (20, 1042083), (21, 992460), (28, 744345), (30, 694722), (34, 612990), (35, 595476), (36, 578935), (42, 496230), (45, 463148), (49, 425340), (51, 408660), (60, 347361), (63, 330820), (68, 306495), (70, 297738), (84, 248115), (85, 245196), (90, 231574), (98, 212670), (102, 204330), (105, 198492), (119, 175140), (126, 165410), (139, 149940), (140, 148869), (147, 141780), (153, 136220), (170, 122598), (180, 115787), (196, 106335), (204, 102165), (210, 99246), (238, 87570), (245, 85068), (252, 82705), (255, 81732), (278, 74970), (294, 70890), (306, 68110), (315, 66164), (340, 61299), (357, 58380), (417, 49980), (420, 49623), (441, 47260), (476, 43785), (490, 42534), (510, 40866), (556, 37485), (588, 35445), (595, 35028), (612, 34055), (630, 33082), (695, 29988), (714, 29190), (735, 28356), (765, 27244), (833, 25020), (834, 24990), (882, 23630), (973, 21420), (980, 21267), (1020, 20433), (1071, 19460), (1190, 17514), (1251, 16660), (1260, 16541), (1390, 14994), (1428, 14595), (1470, 14178), (1530, 13622), (1666, 12510), (1668, 12495), (1764, 11815), (1785, 11676), (1946, 10710), (2085, 9996), (2142, 9730), (2205, 9452), (2363, 8820), (2380, 8757), (2499, 8340), (2502, 8330), (2780, 7497), (2919, 7140), (2940, 7089), (3060, 6811), (3332, 6255), (3570, 5838), (3892, 5355), (4165, 5004), (4170, 4998), (4284, 4865), (4410, 4726)]