21817715

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 29393280

約数和(自身を除く): 7575565

約数列:

[1, 5, 17, 29, 53, 85, 145, 167, 265, 493, 835, 901, 1537, 2465, 2839, 4505, 4843, 7685, 8851, 14195, 24215, 26129, 44255, 82331, 130645, 150467, 256679, 411655, 752335, 1283395, 4363543, 21817715]

約数ペア:

[(1, 21817715), (5, 4363543), (17, 1283395), (29, 752335), (53, 411655), (85, 256679), (145, 150467), (167, 130645), (265, 82331), (493, 44255), (835, 26129), (901, 24215), (1537, 14195), (2465, 8851), (2839, 7685), (4505, 4843)]