20028729

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1\times {\mathrm{173}}^1$

素因数の和:369

約数の個数: 32

約数和(自身を含む): 31737600

約数和(自身を除く): 11708871

約数列:

[1, 3, 7, 21, 37, 111, 149, 173, 259, 447, 519, 777, 1043, 1211, 3129, 3633, 5513, 6401, 16539, 19203, 25777, 38591, 44807, 77331, 115773, 134421, 180439, 541317, 953749, 2861247, 6676243, 20028729]

約数ペア:

[(1, 20028729), (3, 6676243), (7, 2861247), (21, 953749), (37, 541317), (111, 180439), (149, 134421), (173, 115773), (259, 77331), (447, 44807), (519, 38591), (777, 25777), (1043, 19203), (1211, 16539), (3129, 6401), (3633, 5513)]