21284920

素因数分解:

$2^3\times 5^1\times {\mathrm{337}}^1\times {\mathrm{1579}}^1$

素因数の和:1927

約数の個数: 32

約数和(自身を含む): 48063600

約数和(自身を除く): 26778680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 337, 674, 1348, 1579, 1685, 2696, 3158, 3370, 6316, 6740, 7895, 12632, 13480, 15790, 31580, 63160, 532123, 1064246, 2128492, 2660615, 4256984, 5321230, 10642460, 21284920]

約数ペア:

[(1, 21284920), (2, 10642460), (4, 5321230), (5, 4256984), (8, 2660615), (10, 2128492), (20, 1064246), (40, 532123), (337, 63160), (674, 31580), (1348, 15790), (1579, 13480), (1685, 12632), (2696, 7895), (3158, 6740), (3370, 6316)]