20381240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4211}}^1$

素因数の和:4244

約数の個数: 48

約数和(自身を含む): 50417640

約数和(自身を除く): 30036400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4211, 4840, 8422, 16844, 21055, 33688, 42110, 46321, 84220, 92642, 168440, 185284, 231605, 370568, 463210, 509531, 926420, 1019062, 1852840, 2038124, 2547655, 4076248, 5095310, 10190620, 20381240]

約数ペア:

[(1, 20381240), (2, 10190620), (4, 5095310), (5, 4076248), (8, 2547655), (10, 2038124), (11, 1852840), (20, 1019062), (22, 926420), (40, 509531), (44, 463210), (55, 370568), (88, 231605), (110, 185284), (121, 168440), (220, 92642), (242, 84220), (440, 46321), (484, 42110), (605, 33688), (968, 21055), (1210, 16844), (2420, 8422), (4211, 4840)]