397750520

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{140053}}^1$

素因数の和:140135

約数の個数: 32

約数和(自身を含む): 907549920

約数和(自身を除く): 509799400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 140053, 280106, 560212, 700265, 1120424, 1400530, 2801060, 5602120, 9943763, 19887526, 39775052, 49718815, 79550104, 99437630, 198875260, 397750520]

約数ペア:

[(1, 397750520), (2, 198875260), (4, 99437630), (5, 79550104), (8, 49718815), (10, 39775052), (20, 19887526), (40, 9943763), (71, 5602120), (142, 2801060), (284, 1400530), (355, 1120424), (568, 700265), (710, 560212), (1420, 280106), (2840, 140053)]