20656845

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1439}}^1$

素因数の和:1490

約数の個数: 48

約数和(自身を含む): 40435200

約数和(自身を除く): 19778355

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 145, 165, 261, 319, 435, 495, 957, 1305, 1439, 1595, 2871, 4317, 4785, 7195, 12951, 14355, 15829, 21585, 41731, 47487, 64755, 79145, 125193, 142461, 208655, 237435, 375579, 459041, 625965, 712305, 1377123, 1877895, 2295205, 4131369, 6885615, 20656845]

約数ペア:

[(1, 20656845), (3, 6885615), (5, 4131369), (9, 2295205), (11, 1877895), (15, 1377123), (29, 712305), (33, 625965), (45, 459041), (55, 375579), (87, 237435), (99, 208655), (145, 142461), (165, 125193), (261, 79145), (319, 64755), (435, 47487), (495, 41731), (957, 21585), (1305, 15829), (1439, 14355), (1595, 12951), (2871, 7195), (4317, 4785)]