21870

素因数分解:

$2^1\times 3^7\times 5^1$

素因数の和:28

約数の個数: 32

約数和(自身を含む): 59040

約数和(自身を除く): 37170

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 243, 270, 405, 486, 729, 810, 1215, 1458, 2187, 2430, 3645, 4374, 7290, 10935, 21870]

約数ペア:

[(1, 21870), (2, 10935), (3, 7290), (5, 4374), (6, 3645), (9, 2430), (10, 2187), (15, 1458), (18, 1215), (27, 810), (30, 729), (45, 486), (54, 405), (81, 270), (90, 243), (135, 162)]