21307643

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{727}}^1$

素因数の和:866

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 3852037

約数列:

[1, 7, 53, 79, 371, 553, 727, 4187, 5089, 29309, 38531, 57433, 269717, 402031, 3043949, 21307643]

約数ペア:

[(1, 21307643), (7, 3043949), (53, 402031), (79, 269717), (371, 57433), (553, 38531), (727, 29309), (4187, 5089)]