21219765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{3313}}^1$

素因数の和:3389

約数の個数: 32

約数和(自身を含む): 39449856

約数和(自身を除く): 18230091

約数列:

[1, 3, 5, 7, 15, 21, 35, 61, 105, 183, 305, 427, 915, 1281, 2135, 3313, 6405, 9939, 16565, 23191, 49695, 69573, 115955, 202093, 347865, 606279, 1010465, 1414651, 3031395, 4243953, 7073255, 21219765]

約数ペア:

[(1, 21219765), (3, 7073255), (5, 4243953), (7, 3031395), (15, 1414651), (21, 1010465), (35, 606279), (61, 347865), (105, 202093), (183, 115955), (305, 69573), (427, 49695), (915, 23191), (1281, 16565), (2135, 9939), (3313, 6405)]