20861805

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{3557}}^1$

素因数の和:3605

約数の個数: 32

約数和(自身を含む): 36889344

約数和(自身を除く): 16027539

約数列:

[1, 3, 5, 15, 17, 23, 51, 69, 85, 115, 255, 345, 391, 1173, 1955, 3557, 5865, 10671, 17785, 53355, 60469, 81811, 181407, 245433, 302345, 409055, 907035, 1227165, 1390787, 4172361, 6953935, 20861805]

約数ペア:

[(1, 20861805), (3, 6953935), (5, 4172361), (15, 1390787), (17, 1227165), (23, 907035), (51, 409055), (69, 302345), (85, 245433), (115, 181407), (255, 81811), (345, 60469), (391, 53355), (1173, 17785), (1955, 10671), (3557, 5865)]