21198781

素因数分解:

${\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:276

約数の個数: 16

約数和(自身を含む): 22498560

約数和(自身を除く): 1299779

約数列:

[1, 53, 61, 79, 83, 3233, 4187, 4399, 4819, 5063, 6557, 255407, 268339, 347521, 399977, 21198781]

約数ペア:

[(1, 21198781), (53, 399977), (61, 347521), (79, 268339), (83, 255407), (3233, 6557), (4187, 5063), (4399, 4819)]