20018375

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:252

約数の個数: 32

約数和(自身を含む): 27396096

約数和(自身を除く): 7377721

約数列:

[1, 5, 13, 25, 65, 97, 125, 127, 325, 485, 635, 1261, 1625, 1651, 2425, 3175, 6305, 8255, 12125, 12319, 15875, 31525, 41275, 61595, 157625, 160147, 206375, 307975, 800735, 1539875, 4003675, 20018375]

約数ペア:

[(1, 20018375), (5, 4003675), (13, 1539875), (25, 800735), (65, 307975), (97, 206375), (125, 160147), (127, 157625), (325, 61595), (485, 41275), (635, 31525), (1261, 15875), (1625, 12319), (1651, 12125), (2425, 8255), (3175, 6305)]