21375480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25447}}^1$

素因数の和:25468

約数の個数: 64

約数和(自身を含む): 73290240

約数和(自身を除く): 51914760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25447, 50894, 76341, 101788, 127235, 152682, 178129, 203576, 254470, 305364, 356258, 381705, 508940, 534387, 610728, 712516, 763410, 890645, 1017880, 1068774, 1425032, 1526820, 1781290, 2137548, 2671935, 3053640, 3562580, 4275096, 5343870, 7125160, 10687740, 21375480]

約数ペア:

[(1, 21375480), (2, 10687740), (3, 7125160), (4, 5343870), (5, 4275096), (6, 3562580), (7, 3053640), (8, 2671935), (10, 2137548), (12, 1781290), (14, 1526820), (15, 1425032), (20, 1068774), (21, 1017880), (24, 890645), (28, 763410), (30, 712516), (35, 610728), (40, 534387), (42, 508940), (56, 381705), (60, 356258), (70, 305364), (84, 254470), (105, 203576), (120, 178129), (140, 152682), (168, 127235), (210, 101788), (280, 76341), (420, 50894), (840, 25447)]