21524715

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6737}}^1$

素因数の和:6819

約数の個数: 24

約数和(自身を含む): 37840608

約数和(自身を除く): 16315893

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6737, 20211, 33685, 60633, 101055, 303165, 478327, 1434981, 2391635, 4304943, 7174905, 21524715]

約数ペア:

[(1, 21524715), (3, 7174905), (5, 4304943), (9, 2391635), (15, 1434981), (45, 478327), (71, 303165), (213, 101055), (355, 60633), (639, 33685), (1065, 20211), (3195, 6737)]