1990298980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1\times {\mathrm{3067}}^1$

素因数の和:3604

約数の個数: 48

約数和(自身を含む): 4249155456

約数和(自身を除く): 2258856476

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 457, 710, 914, 1420, 1828, 2285, 3067, 4570, 6134, 9140, 12268, 15335, 30670, 32447, 61340, 64894, 129788, 162235, 217757, 324470, 435514, 648940, 871028, 1088785, 1401619, 2177570, 2803238, 4355140, 5606476, 7008095, 14016190, 28032380, 99514949, 199029898, 398059796, 497574745, 995149490, 1990298980]

約数ペア:

[(1, 1990298980), (2, 995149490), (4, 497574745), (5, 398059796), (10, 199029898), (20, 99514949), (71, 28032380), (142, 14016190), (284, 7008095), (355, 5606476), (457, 4355140), (710, 2803238), (914, 2177570), (1420, 1401619), (1828, 1088785), (2285, 871028), (3067, 648940), (4570, 435514), (6134, 324470), (9140, 217757), (12268, 162235), (15335, 129788), (30670, 64894), (32447, 61340)]