21902231

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^2\times {\mathrm{359}}^1$

素因数の和:423

約数の個数: 18

約数和(自身を含む): 25100280

約数和(自身を除く): 3198049

約数列:

[1, 13, 19, 169, 247, 359, 361, 3211, 4667, 4693, 6821, 60671, 61009, 88673, 129599, 1152749, 1684787, 21902231]

約数ペア:

[(1, 21902231), (13, 1684787), (19, 1152749), (169, 129599), (247, 88673), (359, 61009), (361, 60671), (3211, 6821), (4667, 4693)]