21720426

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{5683}}^1$

素因数の和:5715

約数の個数: 48

約数和(自身を含む): 54429984

約数和(自身を除く): 32709558

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 49, 78, 91, 98, 147, 182, 273, 294, 546, 637, 1274, 1911, 3822, 5683, 11366, 17049, 34098, 39781, 73879, 79562, 119343, 147758, 221637, 238686, 278467, 443274, 517153, 556934, 835401, 1034306, 1551459, 1670802, 3102918, 3620071, 7240142, 10860213, 21720426]

約数ペア:

[(1, 21720426), (2, 10860213), (3, 7240142), (6, 3620071), (7, 3102918), (13, 1670802), (14, 1551459), (21, 1034306), (26, 835401), (39, 556934), (42, 517153), (49, 443274), (78, 278467), (91, 238686), (98, 221637), (147, 147758), (182, 119343), (273, 79562), (294, 73879), (546, 39781), (637, 34098), (1274, 17049), (1911, 11366), (3822, 5683)]