81395405

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{619}}^1$

素因数の和:678

約数の個数: 48

約数和(自身を含む): 127908480

約数和(自身を除く): 46513075

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 289, 455, 595, 619, 1105, 1445, 1547, 2023, 3095, 3757, 4333, 7735, 8047, 10115, 10523, 18785, 21665, 26299, 40235, 52615, 56329, 73661, 131495, 136799, 178891, 281645, 368305, 683995, 894455, 957593, 1252237, 2325583, 4787965, 6261185, 11627915, 16279081, 81395405]

約数ペア:

[(1, 81395405), (5, 16279081), (7, 11627915), (13, 6261185), (17, 4787965), (35, 2325583), (65, 1252237), (85, 957593), (91, 894455), (119, 683995), (221, 368305), (289, 281645), (455, 178891), (595, 136799), (619, 131495), (1105, 73661), (1445, 56329), (1547, 52615), (2023, 40235), (3095, 26299), (3757, 21665), (4333, 18785), (7735, 10523), (8047, 10115)]