81529840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145589}}^1$

素因数の和:145609

約数の個数: 40

約数和(自身を含む): 216637920

約数和(自身を除く): 135108080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145589, 291178, 582356, 727945, 1019123, 1164712, 1455890, 2038246, 2329424, 2911780, 4076492, 5095615, 5823560, 8152984, 10191230, 11647120, 16305968, 20382460, 40764920, 81529840]

約数ペア:

[(1, 81529840), (2, 40764920), (4, 20382460), (5, 16305968), (7, 11647120), (8, 10191230), (10, 8152984), (14, 5823560), (16, 5095615), (20, 4076492), (28, 2911780), (35, 2329424), (40, 2038246), (56, 1455890), (70, 1164712), (80, 1019123), (112, 727945), (140, 582356), (280, 291178), (560, 145589)]