258702920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{923939}}^1$

素因数の和:923957

約数の個数: 32

約数和(自身を含む): 665236800

約数和(自身を除く): 406533880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 923939, 1847878, 3695756, 4619695, 6467573, 7391512, 9239390, 12935146, 18478780, 25870292, 32337865, 36957560, 51740584, 64675730, 129351460, 258702920]

約数ペア:

[(1, 258702920), (2, 129351460), (4, 64675730), (5, 51740584), (7, 36957560), (8, 32337865), (10, 25870292), (14, 18478780), (20, 12935146), (28, 9239390), (35, 7391512), (40, 6467573), (56, 4619695), (70, 3695756), (140, 1847878), (280, 923939)]