21471760

素因数分解:

$2^4\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1123}}^1$

素因数の和:1375

約数の個数: 40

約数和(自身を含む): 50175360

約数和(自身を除く): 28703600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 239, 478, 956, 1123, 1195, 1912, 2246, 2390, 3824, 4492, 4780, 5615, 8984, 9560, 11230, 17968, 19120, 22460, 44920, 89840, 268397, 536794, 1073588, 1341985, 2147176, 2683970, 4294352, 5367940, 10735880, 21471760]

約数ペア:

[(1, 21471760), (2, 10735880), (4, 5367940), (5, 4294352), (8, 2683970), (10, 2147176), (16, 1341985), (20, 1073588), (40, 536794), (80, 268397), (239, 89840), (478, 44920), (956, 22460), (1123, 19120), (1195, 17968), (1912, 11230), (2246, 9560), (2390, 8984), (3824, 5615), (4492, 4780)]