21300280

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1213}}^1$

素因数の和:1663

約数の個数: 32

約数和(自身を含む): 48074400

約数和(自身を除く): 26774120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1213, 1756, 2195, 2426, 3512, 4390, 4852, 6065, 8780, 9704, 12130, 17560, 24260, 48520, 532507, 1065014, 2130028, 2662535, 4260056, 5325070, 10650140, 21300280]

約数ペア:

[(1, 21300280), (2, 10650140), (4, 5325070), (5, 4260056), (8, 2662535), (10, 2130028), (20, 1065014), (40, 532507), (439, 48520), (878, 24260), (1213, 17560), (1756, 12130), (2195, 9704), (2426, 8780), (3512, 6065), (4390, 4852)]