821567140

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{398819}}^1$

素因数の和:398931

約数の個数: 24

約数和(自身を含む): 1742045760

約数和(自身を除く): 920478620

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 398819, 797638, 1595276, 1994095, 3988190, 7976380, 41078357, 82156714, 164313428, 205391785, 410783570, 821567140]

約数ペア:

[(1, 821567140), (2, 410783570), (4, 205391785), (5, 164313428), (10, 82156714), (20, 41078357), (103, 7976380), (206, 3988190), (412, 1994095), (515, 1595276), (1030, 797638), (2060, 398819)]