18581264

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{569}}^1$

素因数の和:747

約数の個数: 40

約数和(自身を含む): 39086040

約数和(自身を除く): 20504776

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 157, 208, 314, 569, 628, 1138, 1256, 2041, 2276, 2512, 4082, 4552, 7397, 8164, 9104, 14794, 16328, 29588, 32656, 59176, 89333, 118352, 178666, 357332, 714664, 1161329, 1429328, 2322658, 4645316, 9290632, 18581264]

約数ペア:

[(1, 18581264), (2, 9290632), (4, 4645316), (8, 2322658), (13, 1429328), (16, 1161329), (26, 714664), (52, 357332), (104, 178666), (157, 118352), (208, 89333), (314, 59176), (569, 32656), (628, 29588), (1138, 16328), (1256, 14794), (2041, 9104), (2276, 8164), (2512, 7397), (4082, 4552)]