20015865

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{233}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 36796032

約数和(自身を除く): 16780167

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 83, 115, 207, 233, 249, 345, 415, 699, 747, 1035, 1165, 1245, 1909, 2097, 3495, 3735, 5359, 5727, 9545, 10485, 16077, 17181, 19339, 26795, 28635, 48231, 58017, 80385, 85905, 96695, 174051, 241155, 290085, 444797, 870255, 1334391, 2223985, 4003173, 6671955, 20015865]

約数ペア:

[(1, 20015865), (3, 6671955), (5, 4003173), (9, 2223985), (15, 1334391), (23, 870255), (45, 444797), (69, 290085), (83, 241155), (115, 174051), (207, 96695), (233, 85905), (249, 80385), (345, 58017), (415, 48231), (699, 28635), (747, 26795), (1035, 19339), (1165, 17181), (1245, 16077), (1909, 10485), (2097, 9545), (3495, 5727), (3735, 5359)]