19778860

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6299}}^1$

素因数の和:6465

約数の個数: 24

約数和(自身を含む): 41806800

約数和(自身を除く): 22027940

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6299, 12598, 25196, 31495, 62990, 125980, 988943, 1977886, 3955772, 4944715, 9889430, 19778860]

約数ペア:

[(1, 19778860), (2, 9889430), (4, 4944715), (5, 3955772), (10, 1977886), (20, 988943), (157, 125980), (314, 62990), (628, 31495), (785, 25196), (1570, 12598), (3140, 6299)]