20549980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{3221}}^1$

素因数の和:3270

約数の個数: 48

約数和(自身を含む): 48716640

約数和(自身を除く): 28166660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 44, 55, 58, 110, 116, 145, 220, 290, 319, 580, 638, 1276, 1595, 3190, 3221, 6380, 6442, 12884, 16105, 32210, 35431, 64420, 70862, 93409, 141724, 177155, 186818, 354310, 373636, 467045, 708620, 934090, 1027499, 1868180, 2054998, 4109996, 5137495, 10274990, 20549980]

約数ペア:

[(1, 20549980), (2, 10274990), (4, 5137495), (5, 4109996), (10, 2054998), (11, 1868180), (20, 1027499), (22, 934090), (29, 708620), (44, 467045), (55, 373636), (58, 354310), (110, 186818), (116, 177155), (145, 141724), (220, 93409), (290, 70862), (319, 64420), (580, 35431), (638, 32210), (1276, 16105), (1595, 12884), (3190, 6442), (3221, 6380)]