21090105

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5387}}^1$

素因数の和:5430

約数の個数: 32

約数和(自身を含む): 38793600

約数和(自身を除く): 17703495

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5387, 16161, 26935, 48483, 80805, 145449, 156223, 242415, 468669, 727245, 781115, 1406007, 2343345, 4218021, 7030035, 21090105]

約数ペア:

[(1, 21090105), (3, 7030035), (5, 4218021), (9, 2343345), (15, 1406007), (27, 781115), (29, 727245), (45, 468669), (87, 242415), (135, 156223), (145, 145449), (261, 80805), (435, 48483), (783, 26935), (1305, 16161), (3915, 5387)]