19697727

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{251}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 31256064

約数和(自身を除く): 11558337

約数列:

[1, 3, 7, 21, 37, 101, 111, 251, 259, 303, 707, 753, 777, 1757, 2121, 3737, 5271, 9287, 11211, 25351, 26159, 27861, 65009, 76053, 78477, 177457, 195027, 532371, 937987, 2813961, 6565909, 19697727]

約数ペア:

[(1, 19697727), (3, 6565909), (7, 2813961), (21, 937987), (37, 532371), (101, 195027), (111, 177457), (251, 78477), (259, 76053), (303, 65009), (707, 27861), (753, 26159), (777, 25351), (1757, 11211), (2121, 9287), (3737, 5271)]