21818251

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12619}}^1$

素因数の和:12658

約数の個数: 16

約数和(自身を含む): 28268800

約数和(自身を除く): 6450549

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12619, 88333, 164047, 239761, 1148329, 1678327, 3116893, 21818251]

約数ペア:

[(1, 21818251), (7, 3116893), (13, 1678327), (19, 1148329), (91, 239761), (133, 164047), (247, 88333), (1729, 12619)]