21321976

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{205019}}^1$

素因数の和:205038

約数の個数: 16

約数和(自身を含む): 43054200

約数和(自身を除く): 21732224

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 205019, 410038, 820076, 1640152, 2665247, 5330494, 10660988, 21321976]

約数ペア:

[(1, 21321976), (2, 10660988), (4, 5330494), (8, 2665247), (13, 1640152), (26, 820076), (52, 410038), (104, 205019)]