81210980

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{12973}}^1$

素因数の和:13295

約数の個数: 24

約数和(自身を含む): 171101112

約数和(自身を除く): 89890132

約数列:

[1, 2, 4, 5, 10, 20, 313, 626, 1252, 1565, 3130, 6260, 12973, 25946, 51892, 64865, 129730, 259460, 4060549, 8121098, 16242196, 20302745, 40605490, 81210980]

約数ペア:

[(1, 81210980), (2, 40605490), (4, 20302745), (5, 16242196), (10, 8121098), (20, 4060549), (313, 259460), (626, 129730), (1252, 64865), (1565, 51892), (3130, 25946), (6260, 12973)]