21285220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{3121}}^1$

素因数の和:3172

約数の個数: 48

約数和(自身を含む): 50351616

約数和(自身を除く): 29066396

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 110, 124, 155, 220, 310, 341, 620, 682, 1364, 1705, 3121, 3410, 6242, 6820, 12484, 15605, 31210, 34331, 62420, 68662, 96751, 137324, 171655, 193502, 343310, 387004, 483755, 686620, 967510, 1064261, 1935020, 2128522, 4257044, 5321305, 10642610, 21285220]

約数ペア:

[(1, 21285220), (2, 10642610), (4, 5321305), (5, 4257044), (10, 2128522), (11, 1935020), (20, 1064261), (22, 967510), (31, 686620), (44, 483755), (55, 387004), (62, 343310), (110, 193502), (124, 171655), (155, 137324), (220, 96751), (310, 68662), (341, 62420), (620, 34331), (682, 31210), (1364, 15605), (1705, 12484), (3121, 6820), (3410, 6242)]