20884925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{313}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 27683496

約数和(自身を除く): 6798571

約数列:

[1, 5, 17, 25, 85, 157, 313, 425, 785, 1565, 2669, 3925, 5321, 7825, 13345, 26605, 49141, 66725, 133025, 245705, 835397, 1228525, 4176985, 20884925]

約数ペア:

[(1, 20884925), (5, 4176985), (17, 1228525), (25, 835397), (85, 245705), (157, 133025), (313, 66725), (425, 49141), (785, 26605), (1565, 13345), (2669, 7825), (3925, 5321)]