20249560

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{193}}^1$

素因数の和:308

約数の個数: 64

約数和(自身を含む): 47630880

約数和(自身を除く): 27381320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 61, 86, 122, 172, 193, 215, 244, 305, 344, 386, 430, 488, 610, 772, 860, 965, 1220, 1544, 1720, 1930, 2440, 2623, 3860, 5246, 7720, 8299, 10492, 11773, 13115, 16598, 20984, 23546, 26230, 33196, 41495, 47092, 52460, 58865, 66392, 82990, 94184, 104920, 117730, 165980, 235460, 331960, 470920, 506239, 1012478, 2024956, 2531195, 4049912, 5062390, 10124780, 20249560]

約数ペア:

[(1, 20249560), (2, 10124780), (4, 5062390), (5, 4049912), (8, 2531195), (10, 2024956), (20, 1012478), (40, 506239), (43, 470920), (61, 331960), (86, 235460), (122, 165980), (172, 117730), (193, 104920), (215, 94184), (244, 82990), (305, 66392), (344, 58865), (386, 52460), (430, 47092), (488, 41495), (610, 33196), (772, 26230), (860, 23546), (965, 20984), (1220, 16598), (1544, 13115), (1720, 11773), (1930, 10492), (2440, 8299), (2623, 7720), (3860, 5246)]