21343480

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12409}}^1$

素因数の和:12463

約数の個数: 32

約数和(自身を含む): 49143600

約数和(自身を除く): 27800120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12409, 24818, 49636, 62045, 99272, 124090, 248180, 496360, 533587, 1067174, 2134348, 2667935, 4268696, 5335870, 10671740, 21343480]

約数ペア:

[(1, 21343480), (2, 10671740), (4, 5335870), (5, 4268696), (8, 2667935), (10, 2134348), (20, 1067174), (40, 533587), (43, 496360), (86, 248180), (172, 124090), (215, 99272), (344, 62045), (430, 49636), (860, 24818), (1720, 12409)]