127777780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{28909}}^1$

素因数の和:28948

約数の個数: 48

約数和(自身を含む): 305983440

約数和(自身を除く): 178205660

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, 4420, 28909, 57818, 115636, 144545, 289090, 375817, 491453, 578180, 751634, 982906, 1503268, 1879085, 1965812, 2457265, 3758170, 4914530, 6388889, 7516340, 9829060, 12777778, 25555556, 31944445, 63888890, 127777780]

約数ペア:

[(1, 127777780), (2, 63888890), (4, 31944445), (5, 25555556), (10, 12777778), (13, 9829060), (17, 7516340), (20, 6388889), (26, 4914530), (34, 3758170), (52, 2457265), (65, 1965812), (68, 1879085), (85, 1503268), (130, 982906), (170, 751634), (221, 578180), (260, 491453), (340, 375817), (442, 289090), (884, 144545), (1105, 115636), (2210, 57818), (4420, 28909)]