78428840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{280103}}^1$

素因数の和:280121

約数の個数: 32

約数和(自身を含む): 201674880

約数和(自身を除く): 123246040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 280103, 560206, 1120412, 1400515, 1960721, 2240824, 2801030, 3921442, 5602060, 7842884, 9803605, 11204120, 15685768, 19607210, 39214420, 78428840]

約数ペア:

[(1, 78428840), (2, 39214420), (4, 19607210), (5, 15685768), (7, 11204120), (8, 9803605), (10, 7842884), (14, 5602060), (20, 3921442), (28, 2801030), (35, 2240824), (40, 1960721), (56, 1400515), (70, 1120412), (140, 560206), (280, 280103)]