21236920

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{2203}}^1$

素因数の和:2455

約数の個数: 32

約数和(自身を含む): 48003120

約数和(自身を除く): 26766200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 2203, 2410, 4406, 4820, 8812, 9640, 11015, 17624, 22030, 44060, 88120, 530923, 1061846, 2123692, 2654615, 4247384, 5309230, 10618460, 21236920]

約数ペア:

[(1, 21236920), (2, 10618460), (4, 5309230), (5, 4247384), (8, 2654615), (10, 2123692), (20, 1061846), (40, 530923), (241, 88120), (482, 44060), (964, 22030), (1205, 17624), (1928, 11015), (2203, 9640), (2410, 8812), (4406, 4820)]