642000560

素因数分解:

$2^4\times 5^1\times {\mathrm{313}}^1\times {\mathrm{25639}}^1$

素因数の和:25965

約数の個数: 40

約数和(自身を含む): 1497478560

約数和(自身を除く): 855478000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 313, 626, 1252, 1565, 2504, 3130, 5008, 6260, 12520, 25040, 25639, 51278, 102556, 128195, 205112, 256390, 410224, 512780, 1025560, 2051120, 8025007, 16050014, 32100028, 40125035, 64200056, 80250070, 128400112, 160500140, 321000280, 642000560]

約数ペア:

[(1, 642000560), (2, 321000280), (4, 160500140), (5, 128400112), (8, 80250070), (10, 64200056), (16, 40125035), (20, 32100028), (40, 16050014), (80, 8025007), (313, 2051120), (626, 1025560), (1252, 512780), (1565, 410224), (2504, 256390), (3130, 205112), (5008, 128195), (6260, 102556), (12520, 51278), (25040, 25639)]