217071725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{389}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 310761360

約数和(自身を除く): 93689635

約数列:

[1, 5, 13, 17, 25, 65, 85, 101, 221, 325, 389, 425, 505, 1105, 1313, 1717, 1945, 2525, 5057, 5525, 6565, 6613, 8585, 9725, 22321, 25285, 32825, 33065, 39289, 42925, 85969, 111605, 126425, 165325, 196445, 429845, 510757, 558025, 667913, 982225, 2149225, 2553785, 3339565, 8682869, 12768925, 16697825, 43414345, 217071725]

約数ペア:

[(1, 217071725), (5, 43414345), (13, 16697825), (17, 12768925), (25, 8682869), (65, 3339565), (85, 2553785), (101, 2149225), (221, 982225), (325, 667913), (389, 558025), (425, 510757), (505, 429845), (1105, 196445), (1313, 165325), (1717, 126425), (1945, 111605), (2525, 85969), (5057, 42925), (5525, 39289), (6565, 33065), (6613, 32825), (8585, 25285), (9725, 22321)]