21555315

素因数分解:

$3^5\times 5^1\times {\mathrm{113}}^1\times {\mathrm{157}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 39338208

約数和(自身を除く): 17782893

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 113, 135, 157, 243, 339, 405, 471, 565, 785, 1017, 1215, 1413, 1695, 2355, 3051, 4239, 5085, 7065, 9153, 12717, 15255, 17741, 21195, 27459, 38151, 45765, 53223, 63585, 88705, 137295, 159669, 190755, 266115, 479007, 798345, 1437021, 2395035, 4311063, 7185105, 21555315]

約数ペア:

[(1, 21555315), (3, 7185105), (5, 4311063), (9, 2395035), (15, 1437021), (27, 798345), (45, 479007), (81, 266115), (113, 190755), (135, 159669), (157, 137295), (243, 88705), (339, 63585), (405, 53223), (471, 45765), (565, 38151), (785, 27459), (1017, 21195), (1215, 17741), (1413, 15255), (1695, 12717), (2355, 9153), (3051, 7065), (4239, 5085)]