21563220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51341}}^1$

素因数の和:51360

約数の個数: 48

約数和(自身を含む): 69003648

約数和(自身を除く): 47440428

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, 51341, 102682, 154023, 205364, 256705, 308046, 359387, 513410, 616092, 718774, 770115, 1026820, 1078161, 1437548, 1540230, 1796935, 2156322, 3080460, 3593870, 4312644, 5390805, 7187740, 10781610, 21563220]

約数ペア:

[(1, 21563220), (2, 10781610), (3, 7187740), (4, 5390805), (5, 4312644), (6, 3593870), (7, 3080460), (10, 2156322), (12, 1796935), (14, 1540230), (15, 1437548), (20, 1078161), (21, 1026820), (28, 770115), (30, 718774), (35, 616092), (42, 513410), (60, 359387), (70, 308046), (84, 256705), (105, 205364), (140, 154023), (210, 102682), (420, 51341)]