1280325

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 2171488

約数和(自身を除く): 891163

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 397, 645, 1075, 1191, 1985, 3225, 5955, 9925, 17071, 29775, 51213, 85355, 256065, 426775, 1280325]

約数ペア:

[(1, 1280325), (3, 426775), (5, 256065), (15, 85355), (25, 51213), (43, 29775), (75, 17071), (129, 9925), (215, 5955), (397, 3225), (645, 1985), (1075, 1191)]