19968117

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{197}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 30336768

約数和(自身を除く): 10368651

約数列:

[1, 3, 13, 23, 39, 69, 113, 197, 299, 339, 591, 897, 1469, 2561, 2599, 4407, 4531, 7683, 7797, 13593, 22261, 33787, 58903, 66783, 101361, 176709, 289393, 512003, 868179, 1536009, 6656039, 19968117]

約数ペア:

[(1, 19968117), (3, 6656039), (13, 1536009), (23, 868179), (39, 512003), (69, 289393), (113, 176709), (197, 101361), (299, 66783), (339, 58903), (591, 33787), (897, 22261), (1469, 13593), (2561, 7797), (2599, 7683), (4407, 4531)]