21545660

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15173}}^1$

素因数の和:15253

約数の個数: 24

約数和(自身を含む): 45886176

約数和(自身を除く): 24340516

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15173, 30346, 60692, 75865, 151730, 303460, 1077283, 2154566, 4309132, 5386415, 10772830, 21545660]

約数ペア:

[(1, 21545660), (2, 10772830), (4, 5386415), (5, 4309132), (10, 2154566), (20, 1077283), (71, 303460), (142, 151730), (284, 75865), (355, 60692), (710, 30346), (1420, 15173)]