21688888

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{601}}^1$

素因数の和:967

約数の個数: 32

約数和(自身を含む): 43994160

約数和(自身を除く): 22305272

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 347, 601, 694, 1202, 1388, 2404, 2776, 4511, 4808, 7813, 9022, 15626, 18044, 31252, 36088, 62504, 208547, 417094, 834188, 1668376, 2711111, 5422222, 10844444, 21688888]

約数ペア:

[(1, 21688888), (2, 10844444), (4, 5422222), (8, 2711111), (13, 1668376), (26, 834188), (52, 417094), (104, 208547), (347, 62504), (601, 36088), (694, 31252), (1202, 18044), (1388, 15626), (2404, 9022), (2776, 7813), (4511, 4808)]