664161875

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1901}}^1$

素因数の和:1977

約数の個数: 40

約数和(自身を含む): 915044592

約数和(自身を除く): 250882717

約数列:

[1, 5, 13, 25, 43, 65, 125, 215, 325, 559, 625, 1075, 1625, 1901, 2795, 5375, 8125, 9505, 13975, 24713, 26875, 47525, 69875, 81743, 123565, 237625, 349375, 408715, 617825, 1062659, 1188125, 2043575, 3089125, 5313295, 10217875, 15445625, 26566475, 51089375, 132832375, 664161875]

約数ペア:

[(1, 664161875), (5, 132832375), (13, 51089375), (25, 26566475), (43, 15445625), (65, 10217875), (125, 5313295), (215, 3089125), (325, 2043575), (559, 1188125), (625, 1062659), (1075, 617825), (1625, 408715), (1901, 349375), (2795, 237625), (5375, 123565), (8125, 81743), (9505, 69875), (13975, 47525), (24713, 26875)]