21690515

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1063}}^1$

素因数の和:1139

約数の個数: 32

約数和(自身を含む): 33094656

約数和(自身を除く): 11404141

約数列:

[1, 5, 7, 11, 35, 53, 55, 77, 265, 371, 385, 583, 1063, 1855, 2915, 4081, 5315, 7441, 11693, 20405, 37205, 56339, 58465, 81851, 281695, 394373, 409255, 619729, 1971865, 3098645, 4338103, 21690515]

約数ペア:

[(1, 21690515), (5, 4338103), (7, 3098645), (11, 1971865), (35, 619729), (53, 409255), (55, 394373), (77, 281695), (265, 81851), (371, 58465), (385, 56339), (583, 37205), (1063, 20405), (1855, 11693), (2915, 7441), (4081, 5315)]