20516405

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{673}}^1$

素因数の和:765

約数の個数: 32

約数和(自身を含む): 30799104

約数和(自身を除く): 10282699

約数列:

[1, 5, 7, 13, 35, 65, 67, 91, 335, 455, 469, 673, 871, 2345, 3365, 4355, 4711, 6097, 8749, 23555, 30485, 43745, 45091, 61243, 225455, 306215, 315637, 586183, 1578185, 2930915, 4103281, 20516405]

約数ペア:

[(1, 20516405), (5, 4103281), (7, 2930915), (13, 1578185), (35, 586183), (65, 315637), (67, 306215), (91, 225455), (335, 61243), (455, 45091), (469, 43745), (673, 30485), (871, 23555), (2345, 8749), (3365, 6097), (4355, 4711)]