20160805

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:170

約数の個数: 48

約数和(自身を含む): 30533760

約数和(自身を除く): 10372955

約数列:

[1, 5, 7, 19, 35, 49, 61, 71, 95, 133, 245, 305, 355, 427, 497, 665, 931, 1159, 1349, 2135, 2485, 2989, 3479, 4331, 4655, 5795, 6745, 8113, 9443, 14945, 17395, 21655, 30317, 40565, 47215, 56791, 66101, 82289, 151585, 212219, 283955, 330505, 411445, 576023, 1061095, 2880115, 4032161, 20160805]

約数ペア:

[(1, 20160805), (5, 4032161), (7, 2880115), (19, 1061095), (35, 576023), (49, 411445), (61, 330505), (71, 283955), (95, 212219), (133, 151585), (245, 82289), (305, 66101), (355, 56791), (427, 47215), (497, 40565), (665, 30317), (931, 21655), (1159, 17395), (1349, 14945), (2135, 9443), (2485, 8113), (2989, 6745), (3479, 5795), (4331, 4655)]