201722920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{720439}}^1$

素因数の和:720457

約数の個数: 32

約数和(自身を含む): 518716800

約数和(自身を除く): 316993880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 720439, 1440878, 2881756, 3602195, 5043073, 5763512, 7204390, 10086146, 14408780, 20172292, 25215365, 28817560, 40344584, 50430730, 100861460, 201722920]

約数ペア:

[(1, 201722920), (2, 100861460), (4, 50430730), (5, 40344584), (7, 28817560), (8, 25215365), (10, 20172292), (14, 14408780), (20, 10086146), (28, 7204390), (35, 5763512), (40, 5043073), (56, 3602195), (70, 2881756), (140, 1440878), (280, 720439)]