19440

素因数分解:

$2^4\times 3^5\times 5^1$

素因数の和:28

約数の個数: 60

約数和(自身を含む): 67704

約数和(自身を除く): 48264

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 108, 120, 135, 144, 162, 180, 216, 240, 243, 270, 324, 360, 405, 432, 486, 540, 648, 720, 810, 972, 1080, 1215, 1296, 1620, 1944, 2160, 2430, 3240, 3888, 4860, 6480, 9720, 19440]

約数ペア:

[(1, 19440), (2, 9720), (3, 6480), (4, 4860), (5, 3888), (6, 3240), (8, 2430), (9, 2160), (10, 1944), (12, 1620), (15, 1296), (16, 1215), (18, 1080), (20, 972), (24, 810), (27, 720), (30, 648), (36, 540), (40, 486), (45, 432), (48, 405), (54, 360), (60, 324), (72, 270), (80, 243), (81, 240), (90, 216), (108, 180), (120, 162), (135, 144)]