21320065

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{1361}}^1$

素因数の和:1620

約数の個数: 16

約数和(自身を含む): 27686736

約数和(自身を除く): 6366671

約数列:

[1, 5, 13, 65, 241, 1205, 1361, 3133, 6805, 15665, 17693, 88465, 328001, 1640005, 4264013, 21320065]

約数ペア:

[(1, 21320065), (5, 4264013), (13, 1640005), (65, 328001), (241, 88465), (1205, 17693), (1361, 15665), (3133, 6805)]