20944240

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2699}}^1$

素因数の和:2809

約数の個数: 40

約数和(自身を含む): 49215600

約数和(自身を除く): 28271360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2699, 3880, 5398, 7760, 10796, 13495, 21592, 26990, 43184, 53980, 107960, 215920, 261803, 523606, 1047212, 1309015, 2094424, 2618030, 4188848, 5236060, 10472120, 20944240]

約数ペア:

[(1, 20944240), (2, 10472120), (4, 5236060), (5, 4188848), (8, 2618030), (10, 2094424), (16, 1309015), (20, 1047212), (40, 523606), (80, 261803), (97, 215920), (194, 107960), (388, 53980), (485, 43184), (776, 26990), (970, 21592), (1552, 13495), (1940, 10796), (2699, 7760), (3880, 5398)]