21538580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6689}}^1$

素因数の和:6728

約数の個数: 48

約数和(自身を含む): 53948160

約数和(自身を除く): 32409580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6689, 13378, 26756, 33445, 46823, 66890, 93646, 133780, 153847, 187292, 234115, 307694, 468230, 615388, 769235, 936460, 1076929, 1538470, 2153858, 3076940, 4307716, 5384645, 10769290, 21538580]

約数ペア:

[(1, 21538580), (2, 10769290), (4, 5384645), (5, 4307716), (7, 3076940), (10, 2153858), (14, 1538470), (20, 1076929), (23, 936460), (28, 769235), (35, 615388), (46, 468230), (70, 307694), (92, 234115), (115, 187292), (140, 153847), (161, 133780), (230, 93646), (322, 66890), (460, 46823), (644, 33445), (805, 26756), (1610, 13378), (3220, 6689)]