81783125

素因数分解:

$5^4\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:207

約数の個数: 40

約数和(自身を含む): 110214720

約数和(自身を除く): 28431595

約数列:

[1, 5, 19, 25, 71, 95, 97, 125, 355, 475, 485, 625, 1349, 1775, 1843, 2375, 2425, 6745, 6887, 8875, 9215, 11875, 12125, 33725, 34435, 44375, 46075, 60625, 130853, 168625, 172175, 230375, 654265, 843125, 860875, 1151875, 3271325, 4304375, 16356625, 81783125]

約数ペア:

[(1, 81783125), (5, 16356625), (19, 4304375), (25, 3271325), (71, 1151875), (95, 860875), (97, 843125), (125, 654265), (355, 230375), (475, 172175), (485, 168625), (625, 130853), (1349, 60625), (1775, 46075), (1843, 44375), (2375, 34435), (2425, 33725), (6745, 12125), (6887, 11875), (8875, 9215)]