21178872

素因数分解:

$2^3\times 3^2\times {\mathrm{11}}^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1$

素因数の和:75

約数の個数: 192

約数和(自身を含む): 71940960

約数和(自身を除く): 50762088

約数列:

[1, 2, 3, 4, 6, 8, 9, 11, 12, 13, 17, 18, 22, 24, 26, 33, 34, 36, 39, 44, 51, 52, 66, 68, 72, 78, 88, 99, 102, 104, 117, 121, 132, 136, 143, 153, 156, 187, 198, 204, 221, 234, 242, 264, 286, 306, 312, 363, 374, 396, 408, 429, 442, 468, 484, 561, 572, 612, 663, 726, 748, 792, 858, 884, 936, 968, 1089, 1122, 1144, 1224, 1287, 1326, 1331, 1452, 1496, 1573, 1683, 1716, 1768, 1989, 2057, 2178, 2244, 2431, 2574, 2652, 2662, 2904, 3146, 3366, 3432, 3978, 3993, 4114, 4356, 4488, 4719, 4862, 5148, 5304, 5324, 6171, 6292, 6732, 7293, 7956, 7986, 8228, 8712, 9438, 9724, 10296, 10648, 11979, 12342, 12584, 13464, 14157, 14586, 15912, 15972, 16456, 17303, 18513, 18876, 19448, 21879, 22627, 23958, 24684, 26741, 28314, 29172, 31944, 34606, 37026, 37752, 43758, 45254, 47916, 49368, 51909, 53482, 56628, 58344, 67881, 69212, 74052, 80223, 87516, 90508, 95832, 103818, 106964, 113256, 135762, 138424, 148104, 155727, 160446, 175032, 181016, 203643, 207636, 213928, 240669, 271524, 294151, 311454, 320892, 407286, 415272, 481338, 543048, 588302, 622908, 641784, 814572, 882453, 962676, 1176604, 1245816, 1629144, 1764906, 1925352, 2353208, 2647359, 3529812, 5294718, 7059624, 10589436, 21178872]

約数ペア:

[(1, 21178872), (2, 10589436), (3, 7059624), (4, 5294718), (6, 3529812), (8, 2647359), (9, 2353208), (11, 1925352), (12, 1764906), (13, 1629144), (17, 1245816), (18, 1176604), (22, 962676), (24, 882453), (26, 814572), (33, 641784), (34, 622908), (36, 588302), (39, 543048), (44, 481338), (51, 415272), (52, 407286), (66, 320892), (68, 311454), (72, 294151), (78, 271524), (88, 240669), (99, 213928), (102, 207636), (104, 203643), (117, 181016), (121, 175032), (132, 160446), (136, 155727), (143, 148104), (153, 138424), (156, 135762), (187, 113256), (198, 106964), (204, 103818), (221, 95832), (234, 90508), (242, 87516), (264, 80223), (286, 74052), (306, 69212), (312, 67881), (363, 58344), (374, 56628), (396, 53482), (408, 51909), (429, 49368), (442, 47916), (468, 45254), (484, 43758), (561, 37752), (572, 37026), (612, 34606), (663, 31944), (726, 29172), (748, 28314), (792, 26741), (858, 24684), (884, 23958), (936, 22627), (968, 21879), (1089, 19448), (1122, 18876), (1144, 18513), (1224, 17303), (1287, 16456), (1326, 15972), (1331, 15912), (1452, 14586), (1496, 14157), (1573, 13464), (1683, 12584), (1716, 12342), (1768, 11979), (1989, 10648), (2057, 10296), (2178, 9724), (2244, 9438), (2431, 8712), (2574, 8228), (2652, 7986), (2662, 7956), (2904, 7293), (3146, 6732), (3366, 6292), (3432, 6171), (3978, 5324), (3993, 5304), (4114, 5148), (4356, 4862), (4488, 4719)]