21688660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:185

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 33469100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 53, 70, 74, 79, 106, 140, 148, 158, 185, 212, 259, 265, 316, 370, 371, 395, 518, 530, 553, 740, 742, 790, 1036, 1060, 1106, 1295, 1484, 1580, 1855, 1961, 2212, 2590, 2765, 2923, 3710, 3922, 4187, 5180, 5530, 5846, 7420, 7844, 8374, 9805, 11060, 11692, 13727, 14615, 16748, 19610, 20461, 20935, 27454, 29230, 29309, 39220, 40922, 41870, 54908, 58460, 58618, 68635, 81844, 83740, 102305, 117236, 137270, 146545, 154919, 204610, 274540, 293090, 309838, 409220, 586180, 619676, 774595, 1084433, 1549190, 2168866, 3098380, 4337732, 5422165, 10844330, 21688660]

約数ペア:

[(1, 21688660), (2, 10844330), (4, 5422165), (5, 4337732), (7, 3098380), (10, 2168866), (14, 1549190), (20, 1084433), (28, 774595), (35, 619676), (37, 586180), (53, 409220), (70, 309838), (74, 293090), (79, 274540), (106, 204610), (140, 154919), (148, 146545), (158, 137270), (185, 117236), (212, 102305), (259, 83740), (265, 81844), (316, 68635), (370, 58618), (371, 58460), (395, 54908), (518, 41870), (530, 40922), (553, 39220), (740, 29309), (742, 29230), (790, 27454), (1036, 20935), (1060, 20461), (1106, 19610), (1295, 16748), (1484, 14615), (1580, 13727), (1855, 11692), (1961, 11060), (2212, 9805), (2590, 8374), (2765, 7844), (2923, 7420), (3710, 5846), (3922, 5530), (4187, 5180)]