21695020

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{211}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 47119968

約数和(自身を除く): 25424948

約数列:

[1, 2, 4, 5, 10, 20, 53, 97, 106, 194, 211, 212, 265, 388, 422, 485, 530, 844, 970, 1055, 1060, 1940, 2110, 4220, 5141, 10282, 11183, 20467, 20564, 22366, 25705, 40934, 44732, 51410, 55915, 81868, 102335, 102820, 111830, 204670, 223660, 409340, 1084751, 2169502, 4339004, 5423755, 10847510, 21695020]

約数ペア:

[(1, 21695020), (2, 10847510), (4, 5423755), (5, 4339004), (10, 2169502), (20, 1084751), (53, 409340), (97, 223660), (106, 204670), (194, 111830), (211, 102820), (212, 102335), (265, 81868), (388, 55915), (422, 51410), (485, 44732), (530, 40934), (844, 25705), (970, 22366), (1055, 20564), (1060, 20467), (1940, 11183), (2110, 10282), (4220, 5141)]