81643864

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{293}}^1\times {\mathrm{571}}^1$

素因数の和:931

約数の個数: 32

約数和(自身を含む): 156396240

約数和(自身を除く): 74752376

約数列:

[1, 2, 4, 8, 61, 122, 244, 293, 488, 571, 586, 1142, 1172, 2284, 2344, 4568, 17873, 34831, 35746, 69662, 71492, 139324, 142984, 167303, 278648, 334606, 669212, 1338424, 10205483, 20410966, 40821932, 81643864]

約数ペア:

[(1, 81643864), (2, 40821932), (4, 20410966), (8, 10205483), (61, 1338424), (122, 669212), (244, 334606), (293, 278648), (488, 167303), (571, 142984), (586, 139324), (1142, 71492), (1172, 69662), (2284, 35746), (2344, 34831), (4568, 17873)]