261973960

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{21059}}^1$

素因数の和:21381

約数の個数: 32

約数和(自身を含む): 591364800

約数和(自身を除く): 329390840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 6220, 12440, 21059, 42118, 84236, 105295, 168472, 210590, 421180, 842360, 6549349, 13098698, 26197396, 32746745, 52394792, 65493490, 130986980, 261973960]

約数ペア:

[(1, 261973960), (2, 130986980), (4, 65493490), (5, 52394792), (8, 32746745), (10, 26197396), (20, 13098698), (40, 6549349), (311, 842360), (622, 421180), (1244, 210590), (1555, 168472), (2488, 105295), (3110, 84236), (6220, 42118), (12440, 21059)]