21909875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:264

約数の個数: 32

約数和(自身を含む): 29964480

約数和(自身を除く): 8054605

約数列:

[1, 5, 13, 25, 65, 97, 125, 139, 325, 485, 695, 1261, 1625, 1807, 2425, 3475, 6305, 9035, 12125, 13483, 17375, 31525, 45175, 67415, 157625, 175279, 225875, 337075, 876395, 1685375, 4381975, 21909875]

約数ペア:

[(1, 21909875), (5, 4381975), (13, 1685375), (25, 876395), (65, 337075), (97, 225875), (125, 175279), (139, 157625), (325, 67415), (485, 45175), (695, 31525), (1261, 17375), (1625, 13483), (1807, 12125), (2425, 9035), (3475, 6305)]