18227780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{22229}}^1$

素因数の和:22279

約数の個数: 24

約数和(自身を含む): 39213720

約数和(自身を除く): 20985940

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 22229, 44458, 88916, 111145, 222290, 444580, 911389, 1822778, 3645556, 4556945, 9113890, 18227780]

約数ペア:

[(1, 18227780), (2, 9113890), (4, 4556945), (5, 3645556), (10, 1822778), (20, 911389), (41, 444580), (82, 222290), (164, 111145), (205, 88916), (410, 44458), (820, 22229)]