12640240

素因数分解:

$2^4\times 5^1\times {\mathrm{158003}}^1$

素因数の和:158016

約数の個数: 20

約数和(自身を含む): 29388744

約数和(自身を除く): 16748504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 158003, 316006, 632012, 790015, 1264024, 1580030, 2528048, 3160060, 6320120, 12640240]

約数ペア:

[(1, 12640240), (2, 6320120), (4, 3160060), (5, 2528048), (8, 1580030), (10, 1264024), (16, 790015), (20, 632012), (40, 316006), (80, 158003)]