20665995

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{907}}^1$

素因数の和:960

約数の個数: 48

約数和(自身を含む): 39748608

約数和(自身を除く): 19082613

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 49, 93, 105, 147, 155, 217, 245, 465, 651, 735, 907, 1085, 1519, 2721, 3255, 4535, 4557, 6349, 7595, 13605, 19047, 22785, 28117, 31745, 44443, 84351, 95235, 133329, 140585, 196819, 222215, 421755, 590457, 666645, 984095, 1377733, 2952285, 4133199, 6888665, 20665995]

約数ペア:

[(1, 20665995), (3, 6888665), (5, 4133199), (7, 2952285), (15, 1377733), (21, 984095), (31, 666645), (35, 590457), (49, 421755), (93, 222215), (105, 196819), (147, 140585), (155, 133329), (217, 95235), (245, 84351), (465, 44443), (651, 31745), (735, 28117), (907, 22785), (1085, 19047), (1519, 13605), (2721, 7595), (3255, 6349), (4535, 4557)]