21656460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51563}}^1$

素因数の和:51582

約数の個数: 48

約数和(自身を含む): 69302016

約数和(自身を除く): 47645556

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, 51563, 103126, 154689, 206252, 257815, 309378, 360941, 515630, 618756, 721882, 773445, 1031260, 1082823, 1443764, 1546890, 1804705, 2165646, 3093780, 3609410, 4331292, 5414115, 7218820, 10828230, 21656460]

約数ペア:

[(1, 21656460), (2, 10828230), (3, 7218820), (4, 5414115), (5, 4331292), (6, 3609410), (7, 3093780), (10, 2165646), (12, 1804705), (14, 1546890), (15, 1443764), (20, 1082823), (21, 1031260), (28, 773445), (30, 721882), (35, 618756), (42, 515630), (60, 360941), (70, 309378), (84, 257815), (105, 206252), (140, 154689), (210, 103126), (420, 51563)]