21605220

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1319}}^1$

素因数の和:1354

約数の個数: 144

約数和(自身を含む): 80720640

約数和(自身を除く): 59115420

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 105, 117, 126, 130, 140, 156, 180, 182, 195, 210, 234, 252, 260, 273, 315, 364, 390, 420, 455, 468, 546, 585, 630, 780, 819, 910, 1092, 1170, 1260, 1319, 1365, 1638, 1820, 2340, 2638, 2730, 3276, 3957, 4095, 5276, 5460, 6595, 7914, 8190, 9233, 11871, 13190, 15828, 16380, 17147, 18466, 19785, 23742, 26380, 27699, 34294, 36932, 39570, 46165, 47484, 51441, 55398, 59355, 68588, 79140, 83097, 85735, 92330, 102882, 110796, 118710, 120029, 138495, 154323, 166194, 171470, 184660, 205764, 237420, 240058, 257205, 276990, 308646, 332388, 342940, 360087, 415485, 480116, 514410, 553980, 600145, 617292, 720174, 771615, 830970, 1028820, 1080261, 1200290, 1440348, 1543230, 1661940, 1800435, 2160522, 2400580, 3086460, 3600870, 4321044, 5401305, 7201740, 10802610, 21605220]

約数ペア:

[(1, 21605220), (2, 10802610), (3, 7201740), (4, 5401305), (5, 4321044), (6, 3600870), (7, 3086460), (9, 2400580), (10, 2160522), (12, 1800435), (13, 1661940), (14, 1543230), (15, 1440348), (18, 1200290), (20, 1080261), (21, 1028820), (26, 830970), (28, 771615), (30, 720174), (35, 617292), (36, 600145), (39, 553980), (42, 514410), (45, 480116), (52, 415485), (60, 360087), (63, 342940), (65, 332388), (70, 308646), (78, 276990), (84, 257205), (90, 240058), (91, 237420), (105, 205764), (117, 184660), (126, 171470), (130, 166194), (140, 154323), (156, 138495), (180, 120029), (182, 118710), (195, 110796), (210, 102882), (234, 92330), (252, 85735), (260, 83097), (273, 79140), (315, 68588), (364, 59355), (390, 55398), (420, 51441), (455, 47484), (468, 46165), (546, 39570), (585, 36932), (630, 34294), (780, 27699), (819, 26380), (910, 23742), (1092, 19785), (1170, 18466), (1260, 17147), (1319, 16380), (1365, 15828), (1638, 13190), (1820, 11871), (2340, 9233), (2638, 8190), (2730, 7914), (3276, 6595), (3957, 5460), (4095, 5276)]