209142920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{746939}}^1$

素因数の和:746957

約数の個数: 32

約数和(自身を含む): 537796800

約数和(自身を除く): 328653880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 746939, 1493878, 2987756, 3734695, 5228573, 5975512, 7469390, 10457146, 14938780, 20914292, 26142865, 29877560, 41828584, 52285730, 104571460, 209142920]

約数ペア:

[(1, 209142920), (2, 104571460), (4, 52285730), (5, 41828584), (7, 29877560), (8, 26142865), (10, 20914292), (14, 14938780), (20, 10457146), (28, 7469390), (35, 5975512), (40, 5228573), (56, 3734695), (70, 2987756), (140, 1493878), (280, 746939)]