21999719

素因数分解:

$7^1\times {\mathrm{29}}^2\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:203

約数の個数: 24

約数和(自身を含む): 27007968

約数和(自身を除く): 5008249

約数列:

[1, 7, 29, 37, 101, 203, 259, 707, 841, 1073, 2929, 3737, 5887, 7511, 20503, 26159, 31117, 84941, 108373, 217819, 594587, 758611, 3142817, 21999719]

約数ペア:

[(1, 21999719), (7, 3142817), (29, 758611), (37, 594587), (101, 217819), (203, 108373), (259, 84941), (707, 31117), (841, 26159), (1073, 20503), (2929, 7511), (3737, 5887)]