20947960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47609}}^1$

素因数の和:47631

約数の個数: 32

約数和(自身を含む): 51418800

約数和(自身を除く): 30470840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47609, 95218, 190436, 238045, 380872, 476090, 523699, 952180, 1047398, 1904360, 2094796, 2618495, 4189592, 5236990, 10473980, 20947960]

約数ペア:

[(1, 20947960), (2, 10473980), (4, 5236990), (5, 4189592), (8, 2618495), (10, 2094796), (11, 1904360), (20, 1047398), (22, 952180), (40, 523699), (44, 476090), (55, 380872), (88, 238045), (110, 190436), (220, 95218), (440, 47609)]