21545860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{2297}}^1$

素因数の和:2380

約数の個数: 48

約数和(自身を含む): 52504704

約数和(自身を除く): 30958844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 2297, 2345, 4594, 4690, 9188, 9380, 11485, 16079, 22970, 32158, 45940, 64316, 80395, 153899, 160790, 307798, 321580, 615596, 769495, 1077293, 1538990, 2154586, 3077980, 4309172, 5386465, 10772930, 21545860]

約数ペア:

[(1, 21545860), (2, 10772930), (4, 5386465), (5, 4309172), (7, 3077980), (10, 2154586), (14, 1538990), (20, 1077293), (28, 769495), (35, 615596), (67, 321580), (70, 307798), (134, 160790), (140, 153899), (268, 80395), (335, 64316), (469, 45940), (670, 32158), (938, 22970), (1340, 16079), (1876, 11485), (2297, 9380), (2345, 9188), (4594, 4690)]