21074920

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9941}}^1$

素因数の和:10005

約数の個数: 32

約数和(自身を含む): 48318120

約数和(自身を除く): 27243200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9941, 19882, 39764, 49705, 79528, 99410, 198820, 397640, 526873, 1053746, 2107492, 2634365, 4214984, 5268730, 10537460, 21074920]

約数ペア:

[(1, 21074920), (2, 10537460), (4, 5268730), (5, 4214984), (8, 2634365), (10, 2107492), (20, 1053746), (40, 526873), (53, 397640), (106, 198820), (212, 99410), (265, 79528), (424, 49705), (530, 39764), (1060, 19882), (2120, 9941)]