210318520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{257}}^1\times {\mathrm{499}}^1$

素因数の和:808

約数の個数: 64

約数和(自身を含む): 487620000

約数和(自身を除く): 277301480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 257, 328, 410, 499, 514, 820, 998, 1028, 1285, 1640, 1996, 2056, 2495, 2570, 3992, 4990, 5140, 9980, 10280, 10537, 19960, 20459, 21074, 40918, 42148, 52685, 81836, 84296, 102295, 105370, 128243, 163672, 204590, 210740, 256486, 409180, 421480, 512972, 641215, 818360, 1025944, 1282430, 2564860, 5129720, 5257963, 10515926, 21031852, 26289815, 42063704, 52579630, 105159260, 210318520]

約数ペア:

[(1, 210318520), (2, 105159260), (4, 52579630), (5, 42063704), (8, 26289815), (10, 21031852), (20, 10515926), (40, 5257963), (41, 5129720), (82, 2564860), (164, 1282430), (205, 1025944), (257, 818360), (328, 641215), (410, 512972), (499, 421480), (514, 409180), (820, 256486), (998, 210740), (1028, 204590), (1285, 163672), (1640, 128243), (1996, 105370), (2056, 102295), (2495, 84296), (2570, 81836), (3992, 52685), (4990, 42148), (5140, 40918), (9980, 21074), (10280, 20459), (10537, 19960)]