20011225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{919}}^1$

素因数の和:1009

約数の個数: 24

約数和(自身を含む): 27151040

約数和(自身を除く): 7139815

約数列:

[1, 5, 13, 25, 65, 67, 325, 335, 871, 919, 1675, 4355, 4595, 11947, 21775, 22975, 59735, 61573, 298675, 307865, 800449, 1539325, 4002245, 20011225]

約数ペア:

[(1, 20011225), (5, 4002245), (13, 1539325), (25, 800449), (65, 307865), (67, 298675), (325, 61573), (335, 59735), (871, 22975), (919, 21775), (1675, 11947), (4355, 4595)]