20997080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{271}}^1$

素因数の和:444

約数の個数: 64

約数和(自身を含む): 51408000

約数和(自身を除く): 30410920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 149, 260, 271, 298, 520, 542, 596, 745, 1084, 1192, 1355, 1490, 1937, 2168, 2710, 2980, 3523, 3874, 5420, 5960, 7046, 7748, 9685, 10840, 14092, 15496, 17615, 19370, 28184, 35230, 38740, 40379, 70460, 77480, 80758, 140920, 161516, 201895, 323032, 403790, 524927, 807580, 1049854, 1615160, 2099708, 2624635, 4199416, 5249270, 10498540, 20997080]

約数ペア:

[(1, 20997080), (2, 10498540), (4, 5249270), (5, 4199416), (8, 2624635), (10, 2099708), (13, 1615160), (20, 1049854), (26, 807580), (40, 524927), (52, 403790), (65, 323032), (104, 201895), (130, 161516), (149, 140920), (260, 80758), (271, 77480), (298, 70460), (520, 40379), (542, 38740), (596, 35230), (745, 28184), (1084, 19370), (1192, 17615), (1355, 15496), (1490, 14092), (1937, 10840), (2168, 9685), (2710, 7748), (2980, 7046), (3523, 5960), (3874, 5420)]