21262120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:247

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 33895640

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 44, 46, 55, 88, 92, 110, 115, 121, 184, 191, 220, 230, 242, 253, 382, 440, 460, 484, 506, 605, 764, 920, 955, 968, 1012, 1210, 1265, 1528, 1910, 2024, 2101, 2420, 2530, 2783, 3820, 4202, 4393, 4840, 5060, 5566, 7640, 8404, 8786, 10120, 10505, 11132, 13915, 16808, 17572, 21010, 21965, 22264, 23111, 27830, 35144, 42020, 43930, 46222, 48323, 55660, 84040, 87860, 92444, 96646, 111320, 115555, 175720, 184888, 193292, 231110, 241615, 386584, 462220, 483230, 531553, 924440, 966460, 1063106, 1932920, 2126212, 2657765, 4252424, 5315530, 10631060, 21262120]

約数ペア:

[(1, 21262120), (2, 10631060), (4, 5315530), (5, 4252424), (8, 2657765), (10, 2126212), (11, 1932920), (20, 1063106), (22, 966460), (23, 924440), (40, 531553), (44, 483230), (46, 462220), (55, 386584), (88, 241615), (92, 231110), (110, 193292), (115, 184888), (121, 175720), (184, 115555), (191, 111320), (220, 96646), (230, 92444), (242, 87860), (253, 84040), (382, 55660), (440, 48323), (460, 46222), (484, 43930), (506, 42020), (605, 35144), (764, 27830), (920, 23111), (955, 22264), (968, 21965), (1012, 21010), (1210, 17572), (1265, 16808), (1528, 13915), (1910, 11132), (2024, 10505), (2101, 10120), (2420, 8786), (2530, 8404), (2783, 7640), (3820, 5566), (4202, 5060), (4393, 4840)]