81200020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{7853}}^1$

素因数の和:7920

約数の個数: 48

約数和(自身を含む): 190003968

約数和(自身を除く): 108803948

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 47, 55, 94, 110, 188, 220, 235, 470, 517, 940, 1034, 2068, 2585, 5170, 7853, 10340, 15706, 31412, 39265, 78530, 86383, 157060, 172766, 345532, 369091, 431915, 738182, 863830, 1476364, 1727660, 1845455, 3690910, 4060001, 7381820, 8120002, 16240004, 20300005, 40600010, 81200020]

約数ペア:

[(1, 81200020), (2, 40600010), (4, 20300005), (5, 16240004), (10, 8120002), (11, 7381820), (20, 4060001), (22, 3690910), (44, 1845455), (47, 1727660), (55, 1476364), (94, 863830), (110, 738182), (188, 431915), (220, 369091), (235, 345532), (470, 172766), (517, 157060), (940, 86383), (1034, 78530), (2068, 39265), (2585, 31412), (5170, 15706), (7853, 10340)]