21181480

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6703}}^1$

素因数の和:6793

約数の個数: 32

約数和(自身を含む): 48268800

約数和(自身を除く): 27087320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6703, 13406, 26812, 33515, 53624, 67030, 134060, 268120, 529537, 1059074, 2118148, 2647685, 4236296, 5295370, 10590740, 21181480]

約数ペア:

[(1, 21181480), (2, 10590740), (4, 5295370), (5, 4236296), (8, 2647685), (10, 2118148), (20, 1059074), (40, 529537), (79, 268120), (158, 134060), (316, 67030), (395, 53624), (632, 33515), (790, 26812), (1580, 13406), (3160, 6703)]