402640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{719}}^1$

素因数の和:739

約数の個数: 40

約数和(自身を含む): 1071360

約数和(自身を除く): 668720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 719, 1438, 2876, 3595, 5033, 5752, 7190, 10066, 11504, 14380, 20132, 25165, 28760, 40264, 50330, 57520, 80528, 100660, 201320, 402640]

約数ペア:

[(1, 402640), (2, 201320), (4, 100660), (5, 80528), (7, 57520), (8, 50330), (10, 40264), (14, 28760), (16, 25165), (20, 20132), (28, 14380), (35, 11504), (40, 10066), (56, 7190), (70, 5752), (80, 5033), (112, 3595), (140, 2876), (280, 1438), (560, 719)]