21663220

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 47029248

約数和(自身を除く): 25366028

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 107, 191, 212, 214, 265, 382, 428, 530, 535, 764, 955, 1060, 1070, 1910, 2140, 3820, 5671, 10123, 11342, 20246, 20437, 22684, 28355, 40492, 40874, 50615, 56710, 81748, 101230, 102185, 113420, 202460, 204370, 408740, 1083161, 2166322, 4332644, 5415805, 10831610, 21663220]

約数ペア:

[(1, 21663220), (2, 10831610), (4, 5415805), (5, 4332644), (10, 2166322), (20, 1083161), (53, 408740), (106, 204370), (107, 202460), (191, 113420), (212, 102185), (214, 101230), (265, 81748), (382, 56710), (428, 50615), (530, 40874), (535, 40492), (764, 28355), (955, 22684), (1060, 20437), (1070, 20246), (1910, 11342), (2140, 10123), (3820, 5671)]