21509620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97771}}^1$

素因数の和:97791

約数の個数: 24

約数和(自身を含む): 49277088

約数和(自身を除く): 27767468

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97771, 195542, 391084, 488855, 977710, 1075481, 1955420, 2150962, 4301924, 5377405, 10754810, 21509620]

約数ペア:

[(1, 21509620), (2, 10754810), (4, 5377405), (5, 4301924), (10, 2150962), (11, 1955420), (20, 1075481), (22, 977710), (44, 488855), (55, 391084), (110, 195542), (220, 97771)]