21745971519

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1\times {\mathrm{421}}^1\times {\mathrm{863}}^1$

素因数の和:1639

約数の個数: 32

約数和(自身を含む): 29612003328

約数和(自身を除く): 7866031809

約数列:

[1, 3, 71, 213, 281, 421, 843, 863, 1263, 2589, 19951, 29891, 59853, 61273, 89673, 118301, 183819, 242503, 354903, 363323, 727509, 1089969, 8399371, 17217713, 25198113, 25795933, 51653139, 77387799, 102093763, 306281289, 7248657173, 21745971519]

約数ペア:

[(1, 21745971519), (3, 7248657173), (71, 306281289), (213, 102093763), (281, 77387799), (421, 51653139), (843, 25795933), (863, 25198113), (1263, 17217713), (2589, 8399371), (19951, 1089969), (29891, 727509), (59853, 363323), (61273, 354903), (89673, 242503), (118301, 183819)]