21264340

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^2\times {\mathrm{113}}^1$

素因数の和:316

約数の個数: 36

約数和(自身を含む): 45519516

約数和(自身を除く): 24255176

約数列:

[1, 2, 4, 5, 10, 20, 97, 113, 194, 226, 388, 452, 485, 565, 970, 1130, 1940, 2260, 9409, 10961, 18818, 21922, 37636, 43844, 47045, 54805, 94090, 109610, 188180, 219220, 1063217, 2126434, 4252868, 5316085, 10632170, 21264340]

約数ペア:

[(1, 21264340), (2, 10632170), (4, 5316085), (5, 4252868), (10, 2126434), (20, 1063217), (97, 219220), (113, 188180), (194, 109610), (226, 94090), (388, 54805), (452, 47045), (485, 43844), (565, 37636), (970, 21922), (1130, 18818), (1940, 10961), (2260, 9409)]