21140795

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7889605

約数列:

[1, 5, 13, 23, 65, 79, 115, 179, 299, 395, 895, 1027, 1495, 1817, 2327, 4117, 5135, 9085, 11635, 14141, 20585, 23621, 53521, 70705, 118105, 183833, 267605, 325243, 919165, 1626215, 4228159, 21140795]

約数ペア:

[(1, 21140795), (5, 4228159), (13, 1626215), (23, 919165), (65, 325243), (79, 267605), (115, 183833), (179, 118105), (299, 70705), (395, 53521), (895, 23621), (1027, 20585), (1495, 14141), (1817, 11635), (2327, 9085), (4117, 5135)]