64393880

素因数分解:

$2^3\times 5^1\times {\mathrm{1087}}^1\times {\mathrm{1481}}^1$

素因数の和:2579

約数の個数: 32

約数和(自身を含む): 145117440

約数和(自身を除く): 80723560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1087, 1481, 2174, 2962, 4348, 5435, 5924, 7405, 8696, 10870, 11848, 14810, 21740, 29620, 43480, 59240, 1609847, 3219694, 6439388, 8049235, 12878776, 16098470, 32196940, 64393880]

約数ペア:

[(1, 64393880), (2, 32196940), (4, 16098470), (5, 12878776), (8, 8049235), (10, 6439388), (20, 3219694), (40, 1609847), (1087, 59240), (1481, 43480), (2174, 29620), (2962, 21740), (4348, 14810), (5435, 11848), (5924, 10870), (7405, 8696)]