21515608

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{281}}^1\times {\mathrm{563}}^1$

素因数の和:867

約数の個数: 32

約数和(自身を含む): 42942960

約数和(自身を除く): 21427352

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 281, 562, 563, 1124, 1126, 2248, 2252, 4504, 4777, 9554, 9571, 19108, 19142, 38216, 38284, 76568, 158203, 316406, 632812, 1265624, 2689451, 5378902, 10757804, 21515608]

約数ペア:

[(1, 21515608), (2, 10757804), (4, 5378902), (8, 2689451), (17, 1265624), (34, 632812), (68, 316406), (136, 158203), (281, 76568), (562, 38284), (563, 38216), (1124, 19142), (1126, 19108), (2248, 9571), (2252, 9554), (4504, 4777)]