21013447

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^2$

素因数の和:215

約数の個数: 24

約数和(自身を含む): 26902176

約数和(自身を除く): 5888729

約数列:

[1, 7, 13, 37, 79, 91, 259, 481, 553, 1027, 2923, 3367, 6241, 7189, 20461, 37999, 43687, 81133, 230917, 265993, 567931, 1616419, 3001921, 21013447]

約数ペア:

[(1, 21013447), (7, 3001921), (13, 1616419), (37, 567931), (79, 265993), (91, 230917), (259, 81133), (481, 43687), (553, 37999), (1027, 20461), (2923, 7189), (3367, 6241)]