21925684

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{509}}^1$

素因数の和:624

約数の個数: 36

約数和(自身を含む): 42732900

約数和(自身を除く): 20807216

約数列:

[1, 2, 4, 11, 22, 44, 89, 121, 178, 242, 356, 484, 509, 979, 1018, 1958, 2036, 3916, 5599, 10769, 11198, 21538, 22396, 43076, 45301, 61589, 90602, 123178, 181204, 246356, 498311, 996622, 1993244, 5481421, 10962842, 21925684]

約数ペア:

[(1, 21925684), (2, 10962842), (4, 5481421), (11, 1993244), (22, 996622), (44, 498311), (89, 246356), (121, 181204), (178, 123178), (242, 90602), (356, 61589), (484, 45301), (509, 43076), (979, 22396), (1018, 21538), (1958, 11198), (2036, 10769), (3916, 5599)]