209971375

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{419}}^1$

素因数の和:664

約数の個数: 32

約数和(自身を含む): 277804800

約数和(自身を除く): 67833425

約数列:

[1, 5, 19, 25, 95, 125, 211, 419, 475, 1055, 2095, 2375, 4009, 5275, 7961, 10475, 20045, 26375, 39805, 52375, 88409, 100225, 199025, 442045, 501125, 995125, 1679771, 2210225, 8398855, 11051125, 41994275, 209971375]

約数ペア:

[(1, 209971375), (5, 41994275), (19, 11051125), (25, 8398855), (95, 2210225), (125, 1679771), (211, 995125), (419, 501125), (475, 442045), (1055, 199025), (2095, 100225), (2375, 88409), (4009, 52375), (5275, 39805), (7961, 26375), (10475, 20045)]