20431880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1697}}^1$

素因数の和:1758

約数の個数: 64

約数和(自身を含む): 53792640

約数和(自身を除く): 33360760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1697, 1720, 2408, 3010, 3394, 6020, 6788, 8485, 11879, 12040, 13576, 16970, 23758, 33940, 47516, 59395, 67880, 72971, 95032, 118790, 145942, 237580, 291884, 364855, 475160, 510797, 583768, 729710, 1021594, 1459420, 2043188, 2553985, 2918840, 4086376, 5107970, 10215940, 20431880]

約数ペア:

[(1, 20431880), (2, 10215940), (4, 5107970), (5, 4086376), (7, 2918840), (8, 2553985), (10, 2043188), (14, 1459420), (20, 1021594), (28, 729710), (35, 583768), (40, 510797), (43, 475160), (56, 364855), (70, 291884), (86, 237580), (140, 145942), (172, 118790), (215, 95032), (280, 72971), (301, 67880), (344, 59395), (430, 47516), (602, 33940), (860, 23758), (1204, 16970), (1505, 13576), (1697, 12040), (1720, 11879), (2408, 8485), (3010, 6788), (3394, 6020)]