20393680

素因数分解:

$2^4\times 5^1\times {\mathrm{227}}^1\times {\mathrm{1123}}^1$

素因数の和:1363

約数の個数: 40

約数和(自身を含む): 47666592

約数和(自身を除く): 27272912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 227, 454, 908, 1123, 1135, 1816, 2246, 2270, 3632, 4492, 4540, 5615, 8984, 9080, 11230, 17968, 18160, 22460, 44920, 89840, 254921, 509842, 1019684, 1274605, 2039368, 2549210, 4078736, 5098420, 10196840, 20393680]

約数ペア:

[(1, 20393680), (2, 10196840), (4, 5098420), (5, 4078736), (8, 2549210), (10, 2039368), (16, 1274605), (20, 1019684), (40, 509842), (80, 254921), (227, 89840), (454, 44920), (908, 22460), (1123, 18160), (1135, 17968), (1816, 11230), (2246, 9080), (2270, 8984), (3632, 5615), (4492, 4540)]