21499160

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4931}}^1$

素因数の和:5051

約数の個数: 32

約数和(自身を含む): 48826800

約数和(自身を除く): 27327640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4931, 9862, 19724, 24655, 39448, 49310, 98620, 197240, 537479, 1074958, 2149916, 2687395, 4299832, 5374790, 10749580, 21499160]

約数ペア:

[(1, 21499160), (2, 10749580), (4, 5374790), (5, 4299832), (8, 2687395), (10, 2149916), (20, 1074958), (40, 537479), (109, 197240), (218, 98620), (436, 49310), (545, 39448), (872, 24655), (1090, 19724), (2180, 9862), (4360, 4931)]