81490275

素因数分解:

$3^2\times 5^2\times {\mathrm{587}}^1\times {\mathrm{617}}^1$

素因数の和:1220

約数の個数: 36

約数和(自身を含む): 146443752

約数和(自身を除く): 64953477

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 587, 617, 1761, 1851, 2935, 3085, 5283, 5553, 8805, 9255, 14675, 15425, 26415, 27765, 44025, 46275, 132075, 138825, 362179, 1086537, 1810895, 3259611, 5432685, 9054475, 16298055, 27163425, 81490275]

約数ペア:

[(1, 81490275), (3, 27163425), (5, 16298055), (9, 9054475), (15, 5432685), (25, 3259611), (45, 1810895), (75, 1086537), (225, 362179), (587, 138825), (617, 132075), (1761, 46275), (1851, 44025), (2935, 27765), (3085, 26415), (5283, 15425), (5553, 14675), (8805, 9255)]