21991880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{32341}}^1$

素因数の和:32369

約数の個数: 32

約数和(自身を含む): 52394040

約数和(自身を除く): 30402160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 32341, 64682, 129364, 161705, 258728, 323410, 549797, 646820, 1099594, 1293640, 2199188, 2748985, 4398376, 5497970, 10995940, 21991880]

約数ペア:

[(1, 21991880), (2, 10995940), (4, 5497970), (5, 4398376), (8, 2748985), (10, 2199188), (17, 1293640), (20, 1099594), (34, 646820), (40, 549797), (68, 323410), (85, 258728), (136, 161705), (170, 129364), (340, 64682), (680, 32341)]