128019820

素因数分解:

$2^2\times 5^1\times {\mathrm{1657}}^1\times {\mathrm{3863}}^1$

素因数の和:5529

約数の個数: 24

約数和(自身を含む): 269073504

約数和(自身を除く): 141053684

約数列:

[1, 2, 4, 5, 10, 20, 1657, 3314, 3863, 6628, 7726, 8285, 15452, 16570, 19315, 33140, 38630, 77260, 6400991, 12801982, 25603964, 32004955, 64009910, 128019820]

約数ペア:

[(1, 128019820), (2, 64009910), (4, 32004955), (5, 25603964), (10, 12801982), (20, 6400991), (1657, 77260), (3314, 38630), (3863, 33140), (6628, 19315), (7726, 16570), (8285, 15452)]