18739825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{109}}^1$

素因数の和:178

約数の個数: 36

約数和(自身を含む): 26400220

約数和(自身を除く): 7660395

約数列:

[1, 5, 13, 23, 25, 65, 109, 115, 299, 325, 529, 545, 575, 1417, 1495, 2507, 2645, 2725, 6877, 7085, 7475, 12535, 13225, 32591, 34385, 35425, 57661, 62675, 162955, 171925, 288305, 749593, 814775, 1441525, 3747965, 18739825]

約数ペア:

[(1, 18739825), (5, 3747965), (13, 1441525), (23, 814775), (25, 749593), (65, 288305), (109, 171925), (115, 162955), (299, 62675), (325, 57661), (529, 35425), (545, 34385), (575, 32591), (1417, 13225), (1495, 12535), (2507, 7475), (2645, 7085), (2725, 6877)]