20399390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{733}}^1$

素因数の和:785

約数の個数: 48

約数和(自身を含む): 42172704

約数和(自身を除く): 21773314

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 110, 115, 121, 230, 242, 253, 506, 605, 733, 1210, 1265, 1466, 2530, 2783, 3665, 5566, 7330, 8063, 13915, 16126, 16859, 27830, 33718, 40315, 80630, 84295, 88693, 168590, 177386, 185449, 370898, 443465, 886930, 927245, 1854490, 2039939, 4079878, 10199695, 20399390]

約数ペア:

[(1, 20399390), (2, 10199695), (5, 4079878), (10, 2039939), (11, 1854490), (22, 927245), (23, 886930), (46, 443465), (55, 370898), (110, 185449), (115, 177386), (121, 168590), (230, 88693), (242, 84295), (253, 80630), (506, 40315), (605, 33718), (733, 27830), (1210, 16859), (1265, 16126), (1466, 13915), (2530, 8063), (2783, 7330), (3665, 5566)]