1645840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{2939}}^1$

素因数の和:2959

約数の個数: 40

約数和(自身を含む): 4374720

約数和(自身を除く): 2728880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 2939, 5878, 11756, 14695, 20573, 23512, 29390, 41146, 47024, 58780, 82292, 102865, 117560, 164584, 205730, 235120, 329168, 411460, 822920, 1645840]

約数ペア:

[(1, 1645840), (2, 822920), (4, 411460), (5, 329168), (7, 235120), (8, 205730), (10, 164584), (14, 117560), (16, 102865), (20, 82292), (28, 58780), (35, 47024), (40, 41146), (56, 29390), (70, 23512), (80, 20573), (112, 14695), (140, 11756), (280, 5878), (560, 2939)]