20929996816

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{373}}^1\times {\mathrm{81559}}^1$

素因数の和:81983

約数の個数: 40

約数和(自身を含む): 41606692160

約数和(自身を除く): 20676695344

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 373, 688, 746, 1492, 2984, 5968, 16039, 32078, 64156, 81559, 128312, 163118, 256624, 326236, 652472, 1304944, 3507037, 7014074, 14028148, 28056296, 30421507, 56112592, 60843014, 121686028, 243372056, 486744112, 1308124801, 2616249602, 5232499204, 10464998408, 20929996816]

約数ペア:

[(1, 20929996816), (2, 10464998408), (4, 5232499204), (8, 2616249602), (16, 1308124801), (43, 486744112), (86, 243372056), (172, 121686028), (344, 60843014), (373, 56112592), (688, 30421507), (746, 28056296), (1492, 14028148), (2984, 7014074), (5968, 3507037), (16039, 1304944), (32078, 652472), (64156, 326236), (81559, 256624), (128312, 163118)]