21117395

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{373}}^1$

素因数の和:471

約数の個数: 24

約数和(自身を含む): 27924336

約数和(自身を除く): 6806941

約数列:

[1, 5, 13, 65, 67, 169, 335, 373, 845, 871, 1865, 4355, 4849, 11323, 24245, 24991, 56615, 63037, 124955, 315185, 324883, 1624415, 4223479, 21117395]

約数ペア:

[(1, 21117395), (5, 4223479), (13, 1624415), (65, 324883), (67, 315185), (169, 124955), (335, 63037), (373, 56615), (845, 24991), (871, 24245), (1865, 11323), (4355, 4849)]