21487917

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{797}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 12219603

約数列:

[1, 3, 11, 19, 33, 43, 57, 129, 209, 473, 627, 797, 817, 1419, 2391, 2451, 8767, 8987, 15143, 26301, 26961, 34271, 45429, 102813, 166573, 376981, 499719, 651149, 1130943, 1953447, 7162639, 21487917]

約数ペア:

[(1, 21487917), (3, 7162639), (11, 1953447), (19, 1130943), (33, 651149), (43, 499719), (57, 376981), (129, 166573), (209, 102813), (473, 45429), (627, 34271), (797, 26961), (817, 26301), (1419, 15143), (2391, 8987), (2451, 8767)]