81281564

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{193}}^1$

素因数の和:319

約数の個数: 72

約数和(自身を含む): 178930080

約数和(自身を除く): 97648516

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 89, 91, 169, 178, 182, 193, 338, 356, 364, 386, 623, 676, 772, 1157, 1183, 1246, 1351, 2314, 2366, 2492, 2509, 2702, 4628, 4732, 5018, 5404, 8099, 10036, 15041, 16198, 17177, 17563, 30082, 32396, 32617, 34354, 35126, 60164, 65234, 68708, 70252, 105287, 120239, 130468, 210574, 223301, 228319, 240478, 421148, 446602, 456638, 480956, 893204, 913276, 1563107, 2902913, 3126214, 5805826, 6252428, 11611652, 20320391, 40640782, 81281564]

約数ペア:

[(1, 81281564), (2, 40640782), (4, 20320391), (7, 11611652), (13, 6252428), (14, 5805826), (26, 3126214), (28, 2902913), (52, 1563107), (89, 913276), (91, 893204), (169, 480956), (178, 456638), (182, 446602), (193, 421148), (338, 240478), (356, 228319), (364, 223301), (386, 210574), (623, 130468), (676, 120239), (772, 105287), (1157, 70252), (1183, 68708), (1246, 65234), (1351, 60164), (2314, 35126), (2366, 34354), (2492, 32617), (2509, 32396), (2702, 30082), (4628, 17563), (4732, 17177), (5018, 16198), (5404, 15041), (8099, 10036)]