21358960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{887}}^1$

素因数の和:950

約数の個数: 80

約数和(自身を含む): 58139136

約数和(自身を除く): 36780176

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 43, 56, 70, 80, 86, 112, 140, 172, 215, 280, 301, 344, 430, 560, 602, 688, 860, 887, 1204, 1505, 1720, 1774, 2408, 3010, 3440, 3548, 4435, 4816, 6020, 6209, 7096, 8870, 12040, 12418, 14192, 17740, 24080, 24836, 31045, 35480, 38141, 49672, 62090, 70960, 76282, 99344, 124180, 152564, 190705, 248360, 266987, 305128, 381410, 496720, 533974, 610256, 762820, 1067948, 1334935, 1525640, 2135896, 2669870, 3051280, 4271792, 5339740, 10679480, 21358960]

約数ペア:

[(1, 21358960), (2, 10679480), (4, 5339740), (5, 4271792), (7, 3051280), (8, 2669870), (10, 2135896), (14, 1525640), (16, 1334935), (20, 1067948), (28, 762820), (35, 610256), (40, 533974), (43, 496720), (56, 381410), (70, 305128), (80, 266987), (86, 248360), (112, 190705), (140, 152564), (172, 124180), (215, 99344), (280, 76282), (301, 70960), (344, 62090), (430, 49672), (560, 38141), (602, 35480), (688, 31045), (860, 24836), (887, 24080), (1204, 17740), (1505, 14192), (1720, 12418), (1774, 12040), (2408, 8870), (3010, 7096), (3440, 6209), (3548, 6020), (4435, 4816)]