28209125

素因数分解:

$5^3\times 7^1\times {\mathrm{103}}^1\times {\mathrm{313}}^1$

素因数の和:438

約数の個数: 32

約数和(自身を含む): 40754688

約数和(自身を除く): 12545563

約数列:

[1, 5, 7, 25, 35, 103, 125, 175, 313, 515, 721, 875, 1565, 2191, 2575, 3605, 7825, 10955, 12875, 18025, 32239, 39125, 54775, 90125, 161195, 225673, 273875, 805975, 1128365, 4029875, 5641825, 28209125]

約数ペア:

[(1, 28209125), (5, 5641825), (7, 4029875), (25, 1128365), (35, 805975), (103, 273875), (125, 225673), (175, 161195), (313, 90125), (515, 54775), (721, 39125), (875, 32239), (1565, 18025), (2191, 12875), (2575, 10955), (3605, 7825)]