19979360

素因数分解:

$2^5\times 5^1\times {\mathrm{193}}^1\times {\mathrm{647}}^1$

素因数の和:855

約数の個数: 48

約数和(自身を含む): 47519136

約数和(自身を除く): 27539776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 193, 386, 647, 772, 965, 1294, 1544, 1930, 2588, 3088, 3235, 3860, 5176, 6176, 6470, 7720, 10352, 12940, 15440, 20704, 25880, 30880, 51760, 103520, 124871, 249742, 499484, 624355, 998968, 1248710, 1997936, 2497420, 3995872, 4994840, 9989680, 19979360]

約数ペア:

[(1, 19979360), (2, 9989680), (4, 4994840), (5, 3995872), (8, 2497420), (10, 1997936), (16, 1248710), (20, 998968), (32, 624355), (40, 499484), (80, 249742), (160, 124871), (193, 103520), (386, 51760), (647, 30880), (772, 25880), (965, 20704), (1294, 15440), (1544, 12940), (1930, 10352), (2588, 7720), (3088, 6470), (3235, 6176), (3860, 5176)]