251980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{293}}^1$

素因数の和:345

約数の個数: 24

約数和(自身を含む): 543312

約数和(自身を除く): 291332

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 293, 430, 586, 860, 1172, 1465, 2930, 5860, 12599, 25198, 50396, 62995, 125990, 251980]

約数ペア:

[(1, 251980), (2, 125990), (4, 62995), (5, 50396), (10, 25198), (20, 12599), (43, 5860), (86, 2930), (172, 1465), (215, 1172), (293, 860), (430, 586)]