21759728

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79999}}^1$

素因数の和:80024

約数の個数: 20

約数和(自身を含む): 44640000

約数和(自身を除く): 22880272

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 79999, 159998, 319996, 639992, 1279984, 1359983, 2719966, 5439932, 10879864, 21759728]

約数ペア:

[(1, 21759728), (2, 10879864), (4, 5439932), (8, 2719966), (16, 1359983), (17, 1279984), (34, 639992), (68, 319996), (136, 159998), (272, 79999)]