20817958

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1283}}^1$

素因数の和:1372

約数の個数: 32

約数和(自身を含む): 38211840

約数和(自身を除く): 17393882

約数列:

[1, 2, 7, 14, 19, 38, 61, 122, 133, 266, 427, 854, 1159, 1283, 2318, 2566, 8113, 8981, 16226, 17962, 24377, 48754, 78263, 156526, 170639, 341278, 547841, 1095682, 1486997, 2973994, 10408979, 20817958]

約数ペア:

[(1, 20817958), (2, 10408979), (7, 2973994), (14, 1486997), (19, 1095682), (38, 547841), (61, 341278), (122, 170639), (133, 156526), (266, 78263), (427, 48754), (854, 24377), (1159, 17962), (1283, 16226), (2318, 8981), (2566, 8113)]