21613620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51461}}^1$

素因数の和:51480

約数の個数: 48

約数和(自身を含む): 69164928

約数和(自身を除く): 47551308

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51461, 102922, 154383, 205844, 257305, 308766, 360227, 514610, 617532, 720454, 771915, 1029220, 1080681, 1440908, 1543830, 1801135, 2161362, 3087660, 3602270, 4322724, 5403405, 7204540, 10806810, 21613620]

約数ペア:

[(1, 21613620), (2, 10806810), (3, 7204540), (4, 5403405), (5, 4322724), (6, 3602270), (7, 3087660), (10, 2161362), (12, 1801135), (14, 1543830), (15, 1440908), (20, 1080681), (21, 1029220), (28, 771915), (30, 720454), (35, 617532), (42, 514610), (60, 360227), (70, 308766), (84, 257305), (105, 205844), (140, 154383), (210, 102922), (420, 51461)]