18830020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:313

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 26215484

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 110, 121, 124, 155, 220, 242, 251, 310, 341, 484, 502, 605, 620, 682, 1004, 1210, 1255, 1364, 1705, 2420, 2510, 2761, 3410, 3751, 5020, 5522, 6820, 7502, 7781, 11044, 13805, 15004, 15562, 18755, 27610, 30371, 31124, 37510, 38905, 55220, 60742, 75020, 77810, 85591, 121484, 151855, 155620, 171182, 303710, 342364, 427955, 607420, 855910, 941501, 1711820, 1883002, 3766004, 4707505, 9415010, 18830020]

約数ペア:

[(1, 18830020), (2, 9415010), (4, 4707505), (5, 3766004), (10, 1883002), (11, 1711820), (20, 941501), (22, 855910), (31, 607420), (44, 427955), (55, 342364), (62, 303710), (110, 171182), (121, 155620), (124, 151855), (155, 121484), (220, 85591), (242, 77810), (251, 75020), (310, 60742), (341, 55220), (484, 38905), (502, 37510), (605, 31124), (620, 30371), (682, 27610), (1004, 18755), (1210, 15562), (1255, 15004), (1364, 13805), (1705, 11044), (2420, 7781), (2510, 7502), (2761, 6820), (3410, 5522), (3751, 5020)]