21030088

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{647}}^1$

素因数の和:909

約数の個数: 32

約数和(自身を含む): 41990400

約数和(自身を除く): 20960312

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 239, 478, 647, 956, 1294, 1912, 2588, 4063, 5176, 8126, 10999, 16252, 21998, 32504, 43996, 87992, 154633, 309266, 618532, 1237064, 2628761, 5257522, 10515044, 21030088]

約数ペア:

[(1, 21030088), (2, 10515044), (4, 5257522), (8, 2628761), (17, 1237064), (34, 618532), (68, 309266), (136, 154633), (239, 87992), (478, 43996), (647, 32504), (956, 21998), (1294, 16252), (1912, 10999), (2588, 8126), (4063, 5176)]