640872

素因数分解:

$2^3\times 3^4\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:84

約数の個数: 80

約数和(自身を含む): 1916640

約数和(自身を除く): 1275768

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 23, 24, 27, 36, 43, 46, 54, 69, 72, 81, 86, 92, 108, 129, 138, 162, 172, 184, 207, 216, 258, 276, 324, 344, 387, 414, 516, 552, 621, 648, 774, 828, 989, 1032, 1161, 1242, 1548, 1656, 1863, 1978, 2322, 2484, 2967, 3096, 3483, 3726, 3956, 4644, 4968, 5934, 6966, 7452, 7912, 8901, 9288, 11868, 13932, 14904, 17802, 23736, 26703, 27864, 35604, 53406, 71208, 80109, 106812, 160218, 213624, 320436, 640872]

約数ペア:

[(1, 640872), (2, 320436), (3, 213624), (4, 160218), (6, 106812), (8, 80109), (9, 71208), (12, 53406), (18, 35604), (23, 27864), (24, 26703), (27, 23736), (36, 17802), (43, 14904), (46, 13932), (54, 11868), (69, 9288), (72, 8901), (81, 7912), (86, 7452), (92, 6966), (108, 5934), (129, 4968), (138, 4644), (162, 3956), (172, 3726), (184, 3483), (207, 3096), (216, 2967), (258, 2484), (276, 2322), (324, 1978), (344, 1863), (387, 1656), (414, 1548), (516, 1242), (552, 1161), (621, 1032), (648, 989), (774, 828)]