21861693

素因数分解:

$3^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{557}}^1$

素因数の和:666

約数の個数: 36

約数和(自身を含む): 37213020

約数和(自身を除く): 15351327

約数列:

[1, 3, 7, 9, 21, 49, 63, 89, 147, 267, 441, 557, 623, 801, 1671, 1869, 3899, 4361, 5013, 5607, 11697, 13083, 27293, 35091, 39249, 49573, 81879, 148719, 245637, 347011, 446157, 1041033, 2429077, 3123099, 7287231, 21861693]

約数ペア:

[(1, 21861693), (3, 7287231), (7, 3123099), (9, 2429077), (21, 1041033), (49, 446157), (63, 347011), (89, 245637), (147, 148719), (267, 81879), (441, 49573), (557, 39249), (623, 35091), (801, 27293), (1671, 13083), (1869, 11697), (3899, 5607), (4361, 5013)]