20354440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{809}}^1$

素因数の和:874

約数の個数: 64

約数和(自身を含む): 49863600

約数和(自身を除く): 29509160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 68, 74, 85, 136, 148, 170, 185, 296, 340, 370, 629, 680, 740, 809, 1258, 1480, 1618, 2516, 3145, 3236, 4045, 5032, 6290, 6472, 8090, 12580, 13753, 16180, 25160, 27506, 29933, 32360, 55012, 59866, 68765, 110024, 119732, 137530, 149665, 239464, 275060, 299330, 508861, 550120, 598660, 1017722, 1197320, 2035444, 2544305, 4070888, 5088610, 10177220, 20354440]

約数ペア:

[(1, 20354440), (2, 10177220), (4, 5088610), (5, 4070888), (8, 2544305), (10, 2035444), (17, 1197320), (20, 1017722), (34, 598660), (37, 550120), (40, 508861), (68, 299330), (74, 275060), (85, 239464), (136, 149665), (148, 137530), (170, 119732), (185, 110024), (296, 68765), (340, 59866), (370, 55012), (629, 32360), (680, 29933), (740, 27506), (809, 25160), (1258, 16180), (1480, 13753), (1618, 12580), (2516, 8090), (3145, 6472), (3236, 6290), (4045, 5032)]