21641893

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12517}}^1$

素因数の和:12556

約数の個数: 16

約数和(自身を含む): 28040320

約数和(自身を除く): 6398427

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12517, 87619, 162721, 237823, 1139047, 1664761, 3091699, 21641893]

約数ペア:

[(1, 21641893), (7, 3091699), (13, 1664761), (19, 1139047), (91, 237823), (133, 162721), (247, 87619), (1729, 12517)]