20720865

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{4051}}^1$

素因数の和:4101

約数の個数: 32

約数和(自身を含む): 37343232

約数和(自身を除く): 16622367

約数列:

[1, 3, 5, 11, 15, 31, 33, 55, 93, 155, 165, 341, 465, 1023, 1705, 4051, 5115, 12153, 20255, 44561, 60765, 125581, 133683, 222805, 376743, 627905, 668415, 1381391, 1883715, 4144173, 6906955, 20720865]

約数ペア:

[(1, 20720865), (3, 6906955), (5, 4144173), (11, 1883715), (15, 1381391), (31, 668415), (33, 627905), (55, 376743), (93, 222805), (155, 133683), (165, 125581), (341, 60765), (465, 44561), (1023, 20255), (1705, 12153), (4051, 5115)]