21439465

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{401}}^1$

素因数の和:477

約数の個数: 24

約数和(自身を含む): 28138392

約数和(自身を除く): 6698927

約数列:

[1, 5, 17, 37, 85, 185, 289, 401, 629, 1445, 2005, 3145, 6817, 10693, 14837, 34085, 53465, 74185, 115889, 252229, 579445, 1261145, 4287893, 21439465]

約数ペア:

[(1, 21439465), (5, 4287893), (17, 1261145), (37, 579445), (85, 252229), (185, 115889), (289, 74185), (401, 53465), (629, 34085), (1445, 14837), (2005, 10693), (3145, 6817)]