21293480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40949}}^1$

素因数の和:40973

約数の個数: 32

約数和(自身を含む): 51597000

約数和(自身を除く): 30303520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40949, 81898, 163796, 204745, 327592, 409490, 532337, 818980, 1064674, 1637960, 2129348, 2661685, 4258696, 5323370, 10646740, 21293480]

約数ペア:

[(1, 21293480), (2, 10646740), (4, 5323370), (5, 4258696), (8, 2661685), (10, 2129348), (13, 1637960), (20, 1064674), (26, 818980), (40, 532337), (52, 409490), (65, 327592), (104, 204745), (130, 163796), (260, 81898), (520, 40949)]