18964504

素因数分解:

$2^3\times {\mathrm{13}}^4\times {\mathrm{83}}^1$

素因数の和:141

約数の個数: 40

約数和(自身を含む): 38985660

約数和(自身を除く): 20021156

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 169, 332, 338, 664, 676, 1079, 1352, 2158, 2197, 4316, 4394, 8632, 8788, 14027, 17576, 28054, 28561, 56108, 57122, 112216, 114244, 182351, 228488, 364702, 729404, 1458808, 2370563, 4741126, 9482252, 18964504]

約数ペア:

[(1, 18964504), (2, 9482252), (4, 4741126), (8, 2370563), (13, 1458808), (26, 729404), (52, 364702), (83, 228488), (104, 182351), (166, 114244), (169, 112216), (332, 57122), (338, 56108), (664, 28561), (676, 28054), (1079, 17576), (1352, 14027), (2158, 8788), (2197, 8632), (4316, 4394)]