201721023

素因数分解:

$3^4\times 7^1\times {\mathrm{359}}^1\times {\mathrm{991}}^1$

素因数の和:1369

約数の個数: 40

約数和(自身を含む): 345692160

約数和(自身を除く): 143971137

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 359, 567, 991, 1077, 2513, 2973, 3231, 6937, 7539, 8919, 9693, 20811, 22617, 26757, 29079, 62433, 67851, 80271, 187299, 203553, 355769, 561897, 1067307, 2490383, 3201921, 7471149, 9605763, 22413447, 28817289, 67240341, 201721023]

約数ペア:

[(1, 201721023), (3, 67240341), (7, 28817289), (9, 22413447), (21, 9605763), (27, 7471149), (63, 3201921), (81, 2490383), (189, 1067307), (359, 561897), (567, 355769), (991, 203553), (1077, 187299), (2513, 80271), (2973, 67851), (3231, 62433), (6937, 29079), (7539, 26757), (8919, 22617), (9693, 20811)]