28721225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1319}}^1$

素因数の和:1409

約数の個数: 24

約数和(自身を含む): 38955840

約数和(自身を除く): 10234615

約数列:

[1, 5, 13, 25, 65, 67, 325, 335, 871, 1319, 1675, 4355, 6595, 17147, 21775, 32975, 85735, 88373, 428675, 441865, 1148849, 2209325, 5744245, 28721225]

約数ペア:

[(1, 28721225), (5, 5744245), (13, 2209325), (25, 1148849), (65, 441865), (67, 428675), (325, 88373), (335, 85735), (871, 32975), (1319, 21775), (1675, 17147), (4355, 6595)]