21902805

素因数分解:

$3^7\times 5^1\times {\mathrm{2003}}^1$

素因数の和:2029

約数の個数: 32

約数和(自身を含む): 39438720

約数和(自身を除く): 17535915

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 2003, 2187, 3645, 6009, 10015, 10935, 18027, 30045, 54081, 90135, 162243, 270405, 486729, 811215, 1460187, 2433645, 4380561, 7300935, 21902805]

約数ペア:

[(1, 21902805), (3, 7300935), (5, 4380561), (9, 2433645), (15, 1460187), (27, 811215), (45, 486729), (81, 270405), (135, 162243), (243, 90135), (405, 54081), (729, 30045), (1215, 18027), (2003, 10935), (2187, 10015), (3645, 6009)]