21275960

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11317}}^1$

素因数の和:11375

約数の個数: 32

約数和(自身を含む): 48893760

約数和(自身を除く): 27617800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11317, 22634, 45268, 56585, 90536, 113170, 226340, 452680, 531899, 1063798, 2127596, 2659495, 4255192, 5318990, 10637980, 21275960]

約数ペア:

[(1, 21275960), (2, 10637980), (4, 5318990), (5, 4255192), (8, 2659495), (10, 2127596), (20, 1063798), (40, 531899), (47, 452680), (94, 226340), (188, 113170), (235, 90536), (376, 56585), (470, 45268), (940, 22634), (1880, 11317)]