21422751

素因数分解:

$3^1\times 7^3\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:324

約数の個数: 32

約数和(自身を含む): 33792000

約数和(自身を除く): 12369249

約数列:

[1, 3, 7, 21, 49, 109, 147, 191, 327, 343, 573, 763, 1029, 1337, 2289, 4011, 5341, 9359, 16023, 20819, 28077, 37387, 62457, 65513, 112161, 145733, 196539, 437199, 1020131, 3060393, 7140917, 21422751]

約数ペア:

[(1, 21422751), (3, 7140917), (7, 3060393), (21, 1020131), (49, 437199), (109, 196539), (147, 145733), (191, 112161), (327, 65513), (343, 62457), (573, 37387), (763, 28077), (1029, 20819), (1337, 16023), (2289, 9359), (4011, 5341)]