18694431

素因数分解:

$3^2\times 7^2\times {\mathrm{42391}}^1$

素因数の和:42411

約数の個数: 18

約数和(自身を含む): 31412472

約数和(自身を除く): 12718041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 42391, 127173, 296737, 381519, 890211, 2077159, 2670633, 6231477, 18694431]

約数ペア:

[(1, 18694431), (3, 6231477), (7, 2670633), (9, 2077159), (21, 890211), (49, 381519), (63, 296737), (147, 127173), (441, 42391)]