21005514285

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{921901}}^1$

素因数の和:921954

約数の個数: 48

約数和(自身を含む): 40357181952

約数和(自身を除く): 19351667667

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 49, 93, 105, 147, 155, 217, 245, 465, 651, 735, 1085, 1519, 3255, 4557, 7595, 22785, 921901, 2765703, 4609505, 6453307, 13828515, 19359921, 28578931, 32266535, 45173149, 85736793, 96799605, 135519447, 142894655, 200052517, 225865745, 428683965, 600157551, 677597235, 1000262585, 1400367619, 3000787755, 4201102857, 7001838095, 21005514285]

約数ペア:

[(1, 21005514285), (3, 7001838095), (5, 4201102857), (7, 3000787755), (15, 1400367619), (21, 1000262585), (31, 677597235), (35, 600157551), (49, 428683965), (93, 225865745), (105, 200052517), (147, 142894655), (155, 135519447), (217, 96799605), (245, 85736793), (465, 45173149), (651, 32266535), (735, 28578931), (1085, 19359921), (1519, 13828515), (3255, 6453307), (4557, 4609505), (7595, 2765703), (22785, 921901)]