21266955

素因数分解:

$3^4\times 5^1\times {\mathrm{52511}}^1$

素因数の和:52528

約数の個数: 20

約数和(自身を含む): 38123712

約数和(自身を除く): 16856757

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52511, 157533, 262555, 472599, 787665, 1417797, 2362995, 4253391, 7088985, 21266955]

約数ペア:

[(1, 21266955), (3, 7088985), (5, 4253391), (9, 2362995), (15, 1417797), (27, 787665), (45, 472599), (81, 262555), (135, 157533), (405, 52511)]