19990818

素因数分解:

$2^1\times 3^2\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{443}}^1$

素因数の和:583

約数の個数: 48

約数和(自身を含む): 45714240

約数和(自身を除く): 25723422

約数列:

[1, 2, 3, 6, 9, 18, 23, 46, 69, 109, 138, 207, 218, 327, 414, 443, 654, 886, 981, 1329, 1962, 2507, 2658, 3987, 5014, 7521, 7974, 10189, 15042, 20378, 22563, 30567, 45126, 48287, 61134, 91701, 96574, 144861, 183402, 289722, 434583, 869166, 1110601, 2221202, 3331803, 6663606, 9995409, 19990818]

約数ペア:

[(1, 19990818), (2, 9995409), (3, 6663606), (6, 3331803), (9, 2221202), (18, 1110601), (23, 869166), (46, 434583), (69, 289722), (109, 183402), (138, 144861), (207, 96574), (218, 91701), (327, 61134), (414, 48287), (443, 45126), (654, 30567), (886, 22563), (981, 20378), (1329, 15042), (1962, 10189), (2507, 7974), (2658, 7521), (3987, 5014)]