21989167991

素因数分解:

$7^1\times {\mathrm{113}}^1\times {\mathrm{787}}^1\times {\mathrm{35323}}^1$

素因数の和:36230

約数の個数: 16

約数和(自身を含む): 25385804544

約数和(自身を除く): 3396636553

約数列:

[1, 7, 113, 787, 791, 5509, 35323, 88931, 247261, 622517, 3991499, 27799201, 27940493, 194594407, 3141309713, 21989167991]

約数ペア:

[(1, 21989167991), (7, 3141309713), (113, 194594407), (787, 27940493), (791, 27799201), (5509, 3991499), (35323, 622517), (88931, 247261)]