21971560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:131

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 36089240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 31, 40, 47, 52, 58, 62, 65, 94, 104, 116, 124, 130, 145, 155, 188, 232, 235, 248, 260, 290, 310, 376, 377, 403, 470, 520, 580, 611, 620, 754, 806, 899, 940, 1160, 1222, 1240, 1363, 1457, 1508, 1612, 1798, 1880, 1885, 2015, 2444, 2726, 2914, 3016, 3055, 3224, 3596, 3770, 4030, 4495, 4888, 5452, 5828, 6110, 6815, 7192, 7285, 7540, 8060, 8990, 10904, 11656, 11687, 12220, 13630, 14570, 15080, 16120, 17719, 17980, 18941, 23374, 24440, 27260, 29140, 35438, 35960, 37882, 42253, 46748, 54520, 58280, 58435, 70876, 75764, 84506, 88595, 93496, 94705, 116870, 141752, 151528, 169012, 177190, 189410, 211265, 233740, 338024, 354380, 378820, 422530, 467480, 549289, 708760, 757640, 845060, 1098578, 1690120, 2197156, 2746445, 4394312, 5492890, 10985780, 21971560]

約数ペア:

[(1, 21971560), (2, 10985780), (4, 5492890), (5, 4394312), (8, 2746445), (10, 2197156), (13, 1690120), (20, 1098578), (26, 845060), (29, 757640), (31, 708760), (40, 549289), (47, 467480), (52, 422530), (58, 378820), (62, 354380), (65, 338024), (94, 233740), (104, 211265), (116, 189410), (124, 177190), (130, 169012), (145, 151528), (155, 141752), (188, 116870), (232, 94705), (235, 93496), (248, 88595), (260, 84506), (290, 75764), (310, 70876), (376, 58435), (377, 58280), (403, 54520), (470, 46748), (520, 42253), (580, 37882), (611, 35960), (620, 35438), (754, 29140), (806, 27260), (899, 24440), (940, 23374), (1160, 18941), (1222, 17980), (1240, 17719), (1363, 16120), (1457, 15080), (1508, 14570), (1612, 13630), (1798, 12220), (1880, 11687), (1885, 11656), (2015, 10904), (2444, 8990), (2726, 8060), (2914, 7540), (3016, 7285), (3055, 7192), (3224, 6815), (3596, 6110), (3770, 5828), (4030, 5452), (4495, 4888)]