20797655720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{70177}}^1$

素因数の和:70458

約数の個数: 64

約数和(自身を含む): 48507033600

約数和(自身を除く): 27709377880

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 239, 248, 310, 478, 620, 956, 1195, 1240, 1912, 2390, 4780, 7409, 9560, 14818, 29636, 37045, 59272, 70177, 74090, 140354, 148180, 280708, 296360, 350885, 561416, 701770, 1403540, 2175487, 2807080, 4350974, 8701948, 10877435, 16772303, 17403896, 21754870, 33544606, 43509740, 67089212, 83861515, 87019480, 134178424, 167723030, 335446060, 519941393, 670892120, 1039882786, 2079765572, 2599706965, 4159531144, 5199413930, 10398827860, 20797655720]

約数ペア:

[(1, 20797655720), (2, 10398827860), (4, 5199413930), (5, 4159531144), (8, 2599706965), (10, 2079765572), (20, 1039882786), (31, 670892120), (40, 519941393), (62, 335446060), (124, 167723030), (155, 134178424), (239, 87019480), (248, 83861515), (310, 67089212), (478, 43509740), (620, 33544606), (956, 21754870), (1195, 17403896), (1240, 16772303), (1912, 10877435), (2390, 8701948), (4780, 4350974), (7409, 2807080), (9560, 2175487), (14818, 1403540), (29636, 701770), (37045, 561416), (59272, 350885), (70177, 296360), (74090, 280708), (140354, 148180)]