20567975

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:144

約数の個数: 36

約数和(自身を含む): 28062936

約数和(自身を除く): 7494961

約数列:

[1, 5, 19, 25, 43, 53, 95, 215, 265, 361, 475, 817, 1007, 1075, 1325, 1805, 2279, 4085, 5035, 9025, 11395, 15523, 19133, 20425, 25175, 43301, 56975, 77615, 95665, 216505, 388075, 478325, 822719, 1082525, 4113595, 20567975]

約数ペア:

[(1, 20567975), (5, 4113595), (19, 1082525), (25, 822719), (43, 478325), (53, 388075), (95, 216505), (215, 95665), (265, 77615), (361, 56975), (475, 43301), (817, 25175), (1007, 20425), (1075, 19133), (1325, 15523), (1805, 11395), (2279, 9025), (4085, 5035)]