19949205

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 33035904

約数和(自身を除く): 13086699

約数列:

[1, 3, 5, 15, 43, 129, 157, 197, 215, 471, 591, 645, 785, 985, 2355, 2955, 6751, 8471, 20253, 25413, 30929, 33755, 42355, 92787, 101265, 127065, 154645, 463935, 1329947, 3989841, 6649735, 19949205]

約数ペア:

[(1, 19949205), (3, 6649735), (5, 3989841), (15, 1329947), (43, 463935), (129, 154645), (157, 127065), (197, 101265), (215, 92787), (471, 42355), (591, 33755), (645, 30929), (785, 25413), (985, 20253), (2355, 8471), (2955, 6751)]