21398840

素因数分解:

$2^3\times 5^1\times {\mathrm{534971}}^1$

素因数の和:534982

約数の個数: 16

約数和(自身を含む): 48147480

約数和(自身を除く): 26748640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 534971, 1069942, 2139884, 2674855, 4279768, 5349710, 10699420, 21398840]

約数ペア:

[(1, 21398840), (2, 10699420), (4, 5349710), (5, 4279768), (8, 2674855), (10, 2139884), (20, 1069942), (40, 534971)]