21986291216

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{80831953}}^1$

素因数の和:80831978

約数の個数: 20

約数和(自身を含む): 45104230332

約数和(自身を除く): 23117939116

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 80831953, 161663906, 323327812, 646655624, 1293311248, 1374143201, 2748286402, 5496572804, 10993145608, 21986291216]

約数ペア:

[(1, 21986291216), (2, 10993145608), (4, 5496572804), (8, 2748286402), (16, 1374143201), (17, 1293311248), (34, 646655624), (68, 323327812), (136, 161663906), (272, 80831953)]