21415460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{313}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 49375872

約数和(自身を除く): 27960412

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 311, 313, 622, 626, 1244, 1252, 1555, 1565, 3110, 3130, 3421, 3443, 6220, 6260, 6842, 6886, 13684, 13772, 17105, 17215, 34210, 34430, 68420, 68860, 97343, 194686, 389372, 486715, 973430, 1070773, 1946860, 2141546, 4283092, 5353865, 10707730, 21415460]

約数ペア:

[(1, 21415460), (2, 10707730), (4, 5353865), (5, 4283092), (10, 2141546), (11, 1946860), (20, 1070773), (22, 973430), (44, 486715), (55, 389372), (110, 194686), (220, 97343), (311, 68860), (313, 68420), (622, 34430), (626, 34210), (1244, 17215), (1252, 17105), (1555, 13772), (1565, 13684), (3110, 6886), (3130, 6842), (3421, 6260), (3443, 6220)]