20954605

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^2\times {\mathrm{89}}^1$

素因数の和:170

約数の個数: 36

約数和(自身を含む): 30564540

約数和(自身を除く): 9609935

約数列:

[1, 5, 7, 31, 35, 49, 89, 155, 217, 245, 445, 623, 961, 1085, 1519, 2759, 3115, 4361, 4805, 6727, 7595, 13795, 19313, 21805, 33635, 47089, 85529, 96565, 135191, 235445, 427645, 598703, 675955, 2993515, 4190921, 20954605]

約数ペア:

[(1, 20954605), (5, 4190921), (7, 2993515), (31, 675955), (35, 598703), (49, 427645), (89, 235445), (155, 135191), (217, 96565), (245, 85529), (445, 47089), (623, 33635), (961, 21805), (1085, 19313), (1519, 13795), (2759, 7595), (3115, 6727), (4361, 4805)]