18991180940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1\times {\mathrm{110581}}^1$

素因数の和:110898

約数の個数: 48

約数和(自身を含む): 41316973824

約数和(自身を除く): 22325792884

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 277, 310, 554, 620, 1108, 1385, 2770, 5540, 8587, 17174, 34348, 42935, 85870, 110581, 171740, 221162, 442324, 552905, 1105810, 2211620, 3428011, 6856022, 13712044, 17140055, 30630937, 34280110, 61261874, 68560220, 122523748, 153154685, 306309370, 612618740, 949559047, 1899118094, 3798236188, 4747795235, 9495590470, 18991180940]

約数ペア:

[(1, 18991180940), (2, 9495590470), (4, 4747795235), (5, 3798236188), (10, 1899118094), (20, 949559047), (31, 612618740), (62, 306309370), (124, 153154685), (155, 122523748), (277, 68560220), (310, 61261874), (554, 34280110), (620, 30630937), (1108, 17140055), (1385, 13712044), (2770, 6856022), (5540, 3428011), (8587, 2211620), (17174, 1105810), (34348, 552905), (42935, 442324), (85870, 221162), (110581, 171740)]