21400113

素因数分解:

$3^1\times 7^4\times {\mathrm{2971}}^1$

素因数の和:3002

約数の個数: 20

約数和(自身を含む): 33298288

約数和(自身を除く): 11898175

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 2971, 7203, 8913, 20797, 62391, 145579, 436737, 1019053, 3057159, 7133371, 21400113]

約数ペア:

[(1, 21400113), (3, 7133371), (7, 3057159), (21, 1019053), (49, 436737), (147, 145579), (343, 62391), (1029, 20797), (2401, 8913), (2971, 7203)]