12857780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2909}}^1$

素因数の和:2948

約数の個数: 48

約数和(自身を含む): 30799440

約数和(自身を除く): 17941660

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 2909, 4420, 5818, 11636, 14545, 29090, 37817, 49453, 58180, 75634, 98906, 151268, 189085, 197812, 247265, 378170, 494530, 642889, 756340, 989060, 1285778, 2571556, 3214445, 6428890, 12857780]

約数ペア:

[(1, 12857780), (2, 6428890), (4, 3214445), (5, 2571556), (10, 1285778), (13, 989060), (17, 756340), (20, 642889), (26, 494530), (34, 378170), (52, 247265), (65, 197812), (68, 189085), (85, 151268), (130, 98906), (170, 75634), (221, 58180), (260, 49453), (340, 37817), (442, 29090), (884, 14545), (1105, 11636), (2210, 5818), (2909, 4420)]