21786340

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{499}}^1$

素因数の和:604

約数の個数: 48

約数和(自身を含む): 47880000

約数和(自身を除く): 26093660

約数列:

[1, 2, 4, 5, 10, 20, 37, 59, 74, 118, 148, 185, 236, 295, 370, 499, 590, 740, 998, 1180, 1996, 2183, 2495, 4366, 4990, 8732, 9980, 10915, 18463, 21830, 29441, 36926, 43660, 58882, 73852, 92315, 117764, 147205, 184630, 294410, 369260, 588820, 1089317, 2178634, 4357268, 5446585, 10893170, 21786340]

約数ペア:

[(1, 21786340), (2, 10893170), (4, 5446585), (5, 4357268), (10, 2178634), (20, 1089317), (37, 588820), (59, 369260), (74, 294410), (118, 184630), (148, 147205), (185, 117764), (236, 92315), (295, 73852), (370, 58882), (499, 43660), (590, 36926), (740, 29441), (998, 21830), (1180, 18463), (1996, 10915), (2183, 9980), (2495, 8732), (4366, 4990)]