21410220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27449}}^1$

素因数の和:27474

約数の個数: 48

約数和(自身を含む): 64562400

約数和(自身を除く): 43152180

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27449, 54898, 82347, 109796, 137245, 164694, 274490, 329388, 356837, 411735, 548980, 713674, 823470, 1070511, 1427348, 1646940, 1784185, 2141022, 3568370, 4282044, 5352555, 7136740, 10705110, 21410220]

約数ペア:

[(1, 21410220), (2, 10705110), (3, 7136740), (4, 5352555), (5, 4282044), (6, 3568370), (10, 2141022), (12, 1784185), (13, 1646940), (15, 1427348), (20, 1070511), (26, 823470), (30, 713674), (39, 548980), (52, 411735), (60, 356837), (65, 329388), (78, 274490), (130, 164694), (156, 137245), (195, 109796), (260, 82347), (390, 54898), (780, 27449)]