21978398

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{853}}^1\times {\mathrm{991}}^1$

素因数の和:1859

約数の個数: 16

約数和(自身を含む): 35581056

約数和(自身を除く): 13602658

約数列:

[1, 2, 13, 26, 853, 991, 1706, 1982, 11089, 12883, 22178, 25766, 845323, 1690646, 10989199, 21978398]

約数ペア:

[(1, 21978398), (2, 10989199), (13, 1690646), (26, 845323), (853, 25766), (991, 22178), (1706, 12883), (1982, 11089)]