20181306820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1499}}^1\times {\mathrm{8521}}^1$

素因数の和:10108

約数の個数: 48

約数和(自身を含む): 42950880000

約数和(自身を除く): 22769573180

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1499, 1580, 2998, 5996, 7495, 8521, 14990, 17042, 29980, 34084, 42605, 85210, 118421, 170420, 236842, 473684, 592105, 673159, 1184210, 1346318, 2368420, 2692636, 3365795, 6731590, 12772979, 13463180, 25545958, 51091916, 63864895, 127729790, 255459580, 1009065341, 2018130682, 4036261364, 5045326705, 10090653410, 20181306820]

約数ペア:

[(1, 20181306820), (2, 10090653410), (4, 5045326705), (5, 4036261364), (10, 2018130682), (20, 1009065341), (79, 255459580), (158, 127729790), (316, 63864895), (395, 51091916), (790, 25545958), (1499, 13463180), (1580, 12772979), (2998, 6731590), (5996, 3365795), (7495, 2692636), (8521, 2368420), (14990, 1346318), (17042, 1184210), (29980, 673159), (34084, 592105), (42605, 473684), (85210, 236842), (118421, 170420)]