66647960

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{40639}}^1$

素因数の和:40691

約数の個数: 32

約数和(自身を含む): 153619200

約数和(自身を除く): 86971240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 40639, 81278, 162556, 203195, 325112, 406390, 812780, 1625560, 1666199, 3332398, 6664796, 8330995, 13329592, 16661990, 33323980, 66647960]

約数ペア:

[(1, 66647960), (2, 33323980), (4, 16661990), (5, 13329592), (8, 8330995), (10, 6664796), (20, 3332398), (40, 1666199), (41, 1625560), (82, 812780), (164, 406390), (205, 325112), (328, 203195), (410, 162556), (820, 81278), (1640, 40639)]