19867705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{751}}^1$

素因数の和:817

約数の個数: 32

約数和(自身を含む): 28804608

約数和(自身を除く): 8936903

約数列:

[1, 5, 11, 13, 37, 55, 65, 143, 185, 407, 481, 715, 751, 2035, 2405, 3755, 5291, 8261, 9763, 26455, 27787, 41305, 48815, 107393, 138935, 305657, 361231, 536965, 1528285, 1806155, 3973541, 19867705]

約数ペア:

[(1, 19867705), (5, 3973541), (11, 1806155), (13, 1528285), (37, 536965), (55, 361231), (65, 305657), (143, 138935), (185, 107393), (407, 48815), (481, 41305), (715, 27787), (751, 26455), (2035, 9763), (2405, 8261), (3755, 5291)]