31617985

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 47803392

約数和(自身を除く): 16185407

約数列:

[1, 5, 7, 23, 31, 35, 49, 115, 155, 161, 181, 217, 245, 713, 805, 905, 1085, 1127, 1267, 1519, 3565, 4163, 4991, 5611, 5635, 6335, 7595, 8869, 20815, 24955, 28055, 29141, 34937, 39277, 44345, 129053, 145705, 174685, 196385, 203987, 274939, 645265, 903371, 1019935, 1374695, 4516855, 6323597, 31617985]

約数ペア:

[(1, 31617985), (5, 6323597), (7, 4516855), (23, 1374695), (31, 1019935), (35, 903371), (49, 645265), (115, 274939), (155, 203987), (161, 196385), (181, 174685), (217, 145705), (245, 129053), (713, 44345), (805, 39277), (905, 34937), (1085, 29141), (1127, 28055), (1267, 24955), (1519, 20815), (3565, 8869), (4163, 7595), (4991, 6335), (5611, 5635)]