20666750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{6359}}^1$

素因数の和:6389

約数の個数: 32

約数和(自身を含む): 41670720

約数和(自身を除く): 21003970

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 650, 1625, 3250, 6359, 12718, 31795, 63590, 82667, 158975, 165334, 317950, 413335, 794875, 826670, 1589750, 2066675, 4133350, 10333375, 20666750]

約数ペア:

[(1, 20666750), (2, 10333375), (5, 4133350), (10, 2066675), (13, 1589750), (25, 826670), (26, 794875), (50, 413335), (65, 317950), (125, 165334), (130, 158975), (250, 82667), (325, 63590), (650, 31795), (1625, 12718), (3250, 6359)]