21298545

素因数分解:

$3^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1223}}^1$

素因数の和:1283

約数の個数: 40

約数和(自身を含む): 39099456

約数和(自身を除く): 17800911

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 129, 135, 215, 387, 405, 645, 1161, 1223, 1935, 3483, 3669, 5805, 6115, 11007, 17415, 18345, 33021, 52589, 55035, 99063, 157767, 165105, 262945, 473301, 495315, 788835, 1419903, 2366505, 4259709, 7099515, 21298545]

約数ペア:

[(1, 21298545), (3, 7099515), (5, 4259709), (9, 2366505), (15, 1419903), (27, 788835), (43, 495315), (45, 473301), (81, 262945), (129, 165105), (135, 157767), (215, 99063), (387, 55035), (405, 52589), (645, 33021), (1161, 18345), (1223, 17415), (1935, 11007), (3483, 6115), (3669, 5805)]