21045745

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 32306688

約数和(自身を除く): 11260943

約数列:

[1, 5, 7, 17, 31, 35, 49, 85, 119, 155, 163, 217, 245, 527, 595, 815, 833, 1085, 1141, 1519, 2635, 2771, 3689, 4165, 5053, 5705, 7595, 7987, 13855, 18445, 19397, 25265, 25823, 35371, 39935, 85901, 96985, 129115, 135779, 176855, 247597, 429505, 601307, 678895, 1237985, 3006535, 4209149, 21045745]

約数ペア:

[(1, 21045745), (5, 4209149), (7, 3006535), (17, 1237985), (31, 678895), (35, 601307), (49, 429505), (85, 247597), (119, 176855), (155, 135779), (163, 129115), (217, 96985), (245, 85901), (527, 39935), (595, 35371), (815, 25823), (833, 25265), (1085, 19397), (1141, 18445), (1519, 13855), (2635, 7987), (2771, 7595), (3689, 5705), (4165, 5053)]