21647834

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:159

約数の個数: 48

約数和(自身を含む): 38578848

約数和(自身を除く): 16931014

約数列:

[1, 2, 13, 17, 26, 34, 43, 67, 86, 134, 221, 289, 442, 559, 578, 731, 871, 1118, 1139, 1462, 1742, 2278, 2881, 3757, 5762, 7514, 9503, 12427, 14807, 19006, 19363, 24854, 29614, 37453, 38726, 48977, 74906, 97954, 161551, 251719, 323102, 503438, 636701, 832609, 1273402, 1665218, 10823917, 21647834]

約数ペア:

[(1, 21647834), (2, 10823917), (13, 1665218), (17, 1273402), (26, 832609), (34, 636701), (43, 503438), (67, 323102), (86, 251719), (134, 161551), (221, 97954), (289, 74906), (442, 48977), (559, 38726), (578, 37453), (731, 29614), (871, 24854), (1118, 19363), (1139, 19006), (1462, 14807), (1742, 12427), (2278, 9503), (2881, 7514), (3757, 5762)]