17993997

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{103}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 31150080

約数和(自身を除く): 13156083

約数列:

[1, 3, 7, 9, 21, 47, 59, 63, 103, 141, 177, 309, 329, 413, 423, 531, 721, 927, 987, 1239, 2163, 2773, 2961, 3717, 4841, 6077, 6489, 8319, 14523, 18231, 19411, 24957, 33887, 42539, 43569, 54693, 58233, 101661, 127617, 174699, 285619, 304983, 382851, 856857, 1999333, 2570571, 5997999, 17993997]

約数ペア:

[(1, 17993997), (3, 5997999), (7, 2570571), (9, 1999333), (21, 856857), (47, 382851), (59, 304983), (63, 285619), (103, 174699), (141, 127617), (177, 101661), (309, 58233), (329, 54693), (413, 43569), (423, 42539), (531, 33887), (721, 24957), (927, 19411), (987, 18231), (1239, 14523), (2163, 8319), (2773, 6489), (2961, 6077), (3717, 4841)]