20387900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{15683}}^1$

素因数の和:15710

約数の個数: 36

約数和(自身を含む): 47647992

約数和(自身を除く): 27260092

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 15683, 31366, 62732, 78415, 156830, 203879, 313660, 392075, 407758, 784150, 815516, 1019395, 1568300, 2038790, 4077580, 5096975, 10193950, 20387900]

約数ペア:

[(1, 20387900), (2, 10193950), (4, 5096975), (5, 4077580), (10, 2038790), (13, 1568300), (20, 1019395), (25, 815516), (26, 784150), (50, 407758), (52, 392075), (65, 313660), (100, 203879), (130, 156830), (260, 78415), (325, 62732), (650, 31366), (1300, 15683)]