21215655

素因数分解:

$3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3833}}^1$

素因数の和:3888

約数の個数: 32

約数和(自身を含む): 38646720

約数和(自身を除く): 17431065

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 123, 135, 205, 369, 615, 1107, 1845, 3833, 5535, 11499, 19165, 34497, 57495, 103491, 157153, 172485, 471459, 517455, 785765, 1414377, 2357295, 4243131, 7071885, 21215655]

約数ペア:

[(1, 21215655), (3, 7071885), (5, 4243131), (9, 2357295), (15, 1414377), (27, 785765), (41, 517455), (45, 471459), (123, 172485), (135, 157153), (205, 103491), (369, 57495), (615, 34497), (1107, 19165), (1845, 11499), (3833, 5535)]