18831981

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^2\times {\mathrm{241}}^1$

素因数の和:373

約数の個数: 24

約数和(自身を含む): 29295552

約数和(自身を除く): 10463571

約数列:

[1, 3, 7, 21, 61, 183, 241, 427, 723, 1281, 1687, 3721, 5061, 11163, 14701, 26047, 44103, 78141, 102907, 308721, 896761, 2690283, 6277327, 18831981]

約数ペア:

[(1, 18831981), (3, 6277327), (7, 2690283), (21, 896761), (61, 308721), (183, 102907), (241, 78141), (427, 44103), (723, 26047), (1281, 14701), (1687, 11163), (3721, 5061)]