21999187

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{197}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 26815536

約数和(自身を除く): 4816349

約数列:

[1, 7, 43, 49, 53, 197, 301, 371, 1379, 2107, 2279, 2597, 8471, 9653, 10441, 15953, 59297, 73087, 111671, 415079, 448963, 511609, 3142741, 21999187]

約数ペア:

[(1, 21999187), (7, 3142741), (43, 511609), (49, 448963), (53, 415079), (197, 111671), (301, 73087), (371, 59297), (1379, 15953), (2107, 10441), (2279, 9653), (2597, 8471)]