21205625

素因数分解:

$5^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:195

約数の個数: 40

約数和(自身を含む): 31339968

約数和(自身を除く): 10134343

約数列:

[1, 5, 7, 25, 35, 37, 125, 131, 175, 185, 259, 625, 655, 875, 917, 925, 1295, 3275, 4375, 4585, 4625, 4847, 6475, 16375, 22925, 23125, 24235, 32375, 33929, 81875, 114625, 121175, 161875, 169645, 573125, 605875, 848225, 3029375, 4241125, 21205625]

約数ペア:

[(1, 21205625), (5, 4241125), (7, 3029375), (25, 848225), (35, 605875), (37, 573125), (125, 169645), (131, 161875), (175, 121175), (185, 114625), (259, 81875), (625, 33929), (655, 32375), (875, 24235), (917, 23125), (925, 22925), (1295, 16375), (3275, 6475), (4375, 4847), (4585, 4625)]