820021720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{21377}}^1$

素因数の和:21532

約数の個数: 64

約数和(自身を含む): 2124118080

約数和(自身を除く): 1304096360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 137, 140, 274, 280, 548, 685, 959, 1096, 1370, 1918, 2740, 3836, 4795, 5480, 7672, 9590, 19180, 21377, 38360, 42754, 85508, 106885, 149639, 171016, 213770, 299278, 427540, 598556, 748195, 855080, 1197112, 1496390, 2928649, 2992780, 5857298, 5985560, 11714596, 14643245, 20500543, 23429192, 29286490, 41001086, 58572980, 82002172, 102502715, 117145960, 164004344, 205005430, 410010860, 820021720]

約数ペア:

[(1, 820021720), (2, 410010860), (4, 205005430), (5, 164004344), (7, 117145960), (8, 102502715), (10, 82002172), (14, 58572980), (20, 41001086), (28, 29286490), (35, 23429192), (40, 20500543), (56, 14643245), (70, 11714596), (137, 5985560), (140, 5857298), (274, 2992780), (280, 2928649), (548, 1496390), (685, 1197112), (959, 855080), (1096, 748195), (1370, 598556), (1918, 427540), (2740, 299278), (3836, 213770), (4795, 171016), (5480, 149639), (7672, 106885), (9590, 85508), (19180, 42754), (21377, 38360)]