21220910

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{1667}}^1$

素因数の和:1760

約数の個数: 32

約数和(自身を含む): 40832640

約数和(自身を除く): 19611730

約数列:

[1, 2, 5, 10, 19, 38, 67, 95, 134, 190, 335, 670, 1273, 1667, 2546, 3334, 6365, 8335, 12730, 16670, 31673, 63346, 111689, 158365, 223378, 316730, 558445, 1116890, 2122091, 4244182, 10610455, 21220910]

約数ペア:

[(1, 21220910), (2, 10610455), (5, 4244182), (10, 2122091), (19, 1116890), (38, 558445), (67, 316730), (95, 223378), (134, 158365), (190, 111689), (335, 63346), (670, 31673), (1273, 16670), (1667, 12730), (2546, 8335), (3334, 6365)]