20213431

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:259

約数の個数: 24

約数和(自身を含む): 24558336

約数和(自身を除く): 4344905

約数列:

[1, 7, 47, 49, 67, 131, 329, 469, 917, 2303, 3149, 3283, 6157, 6419, 8777, 22043, 43099, 61439, 154301, 301693, 412519, 430073, 2887633, 20213431]

約数ペア:

[(1, 20213431), (7, 2887633), (47, 430073), (49, 412519), (67, 301693), (131, 154301), (329, 61439), (469, 43099), (917, 22043), (2303, 8777), (3149, 6419), (3283, 6157)]