21178360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1759}}^1$

素因数の和:1820

約数の個数: 64

約数和(自身を含む): 55756800

約数和(自身を除く): 34578440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1720, 1759, 2408, 3010, 3518, 6020, 7036, 8795, 12040, 12313, 14072, 17590, 24626, 35180, 49252, 61565, 70360, 75637, 98504, 123130, 151274, 246260, 302548, 378185, 492520, 529459, 605096, 756370, 1058918, 1512740, 2117836, 2647295, 3025480, 4235672, 5294590, 10589180, 21178360]

約数ペア:

[(1, 21178360), (2, 10589180), (4, 5294590), (5, 4235672), (7, 3025480), (8, 2647295), (10, 2117836), (14, 1512740), (20, 1058918), (28, 756370), (35, 605096), (40, 529459), (43, 492520), (56, 378185), (70, 302548), (86, 246260), (140, 151274), (172, 123130), (215, 98504), (280, 75637), (301, 70360), (344, 61565), (430, 49252), (602, 35180), (860, 24626), (1204, 17590), (1505, 14072), (1720, 12313), (1759, 12040), (2408, 8795), (3010, 7036), (3518, 6020)]