257171980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{989123}}^1$

素因数の和:989145

約数の個数: 24

約数和(自身を含む): 581604912

約数和(自身を除く): 324432932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 989123, 1978246, 3956492, 4945615, 9891230, 12858599, 19782460, 25717198, 51434396, 64292995, 128585990, 257171980]

約数ペア:

[(1, 257171980), (2, 128585990), (4, 64292995), (5, 51434396), (10, 25717198), (13, 19782460), (20, 12858599), (26, 9891230), (52, 4945615), (65, 3956492), (130, 1978246), (260, 989123)]