521140431

素因数分解:

$3^1\times 7^2\times {\mathrm{541}}^1\times {\mathrm{6553}}^1$

素因数の和:7111

約数の個数: 24

約数和(自身を含む): 809917104

約数和(自身を除く): 288776673

約数列:

[1, 3, 7, 21, 49, 147, 541, 1623, 3787, 6553, 11361, 19659, 26509, 45871, 79527, 137613, 321097, 963291, 3545173, 10635519, 24816211, 74448633, 173713477, 521140431]

約数ペア:

[(1, 521140431), (3, 173713477), (7, 74448633), (21, 24816211), (49, 10635519), (147, 3545173), (541, 963291), (1623, 321097), (3787, 137613), (6553, 79527), (11361, 45871), (19659, 26509)]