21187935

素因数分解:

$3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{2999}}^1$

素因数の和:3167

約数の個数: 24

約数和(自身を含む): 36972000

約数和(自身を除く): 15784065

約数列:

[1, 3, 5, 9, 15, 45, 157, 471, 785, 1413, 2355, 2999, 7065, 8997, 14995, 26991, 44985, 134955, 470843, 1412529, 2354215, 4237587, 7062645, 21187935]

約数ペア:

[(1, 21187935), (3, 7062645), (5, 4237587), (9, 2354215), (15, 1412529), (45, 470843), (157, 134955), (471, 44985), (785, 26991), (1413, 14995), (2355, 8997), (2999, 7065)]