20781475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{5813}}^1$

素因数の和:5847

約数の個数: 24

約数和(自身を含む): 30279312

約数和(自身を除く): 9497837

約数列:

[1, 5, 11, 13, 25, 55, 65, 143, 275, 325, 715, 3575, 5813, 29065, 63943, 75569, 145325, 319715, 377845, 831259, 1598575, 1889225, 4156295, 20781475]

約数ペア:

[(1, 20781475), (5, 4156295), (11, 1889225), (13, 1598575), (25, 831259), (55, 377845), (65, 319715), (143, 145325), (275, 75569), (325, 63943), (715, 29065), (3575, 5813)]