21281350

素因数分解:

$2^1\times 5^2\times {\mathrm{157}}^1\times {\mathrm{2711}}^1$

素因数の和:2880

約数の個数: 24

約数和(自身を含む): 39850128

約数和(自身を除く): 18568778

約数列:

[1, 2, 5, 10, 25, 50, 157, 314, 785, 1570, 2711, 3925, 5422, 7850, 13555, 27110, 67775, 135550, 425627, 851254, 2128135, 4256270, 10640675, 21281350]

約数ペア:

[(1, 21281350), (2, 10640675), (5, 4256270), (10, 2128135), (25, 851254), (50, 425627), (157, 135550), (314, 67775), (785, 27110), (1570, 13555), (2711, 7850), (3925, 5422)]