321781520

素因数分解:

$2^4\times 5^1\times {\mathrm{191}}^1\times {\mathrm{21059}}^1$

素因数の和:21263

約数の個数: 40

約数和(自身を含む): 752094720

約数和(自身を除く): 430313200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 191, 382, 764, 955, 1528, 1910, 3056, 3820, 7640, 15280, 21059, 42118, 84236, 105295, 168472, 210590, 336944, 421180, 842360, 1684720, 4022269, 8044538, 16089076, 20111345, 32178152, 40222690, 64356304, 80445380, 160890760, 321781520]

約数ペア:

[(1, 321781520), (2, 160890760), (4, 80445380), (5, 64356304), (8, 40222690), (10, 32178152), (16, 20111345), (20, 16089076), (40, 8044538), (80, 4022269), (191, 1684720), (382, 842360), (764, 421180), (955, 336944), (1528, 210590), (1910, 168472), (3056, 105295), (3820, 84236), (7640, 42118), (15280, 21059)]