21415905

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67987}}^1$

素因数の和:68005

約数の個数: 24

約数和(自身を含む): 42424512

約数和(自身を除く): 21008607

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67987, 203961, 339935, 475909, 611883, 1019805, 1427727, 2379545, 3059415, 4283181, 7138635, 21415905]

約数ペア:

[(1, 21415905), (3, 7138635), (5, 4283181), (7, 3059415), (9, 2379545), (15, 1427727), (21, 1019805), (35, 611883), (45, 475909), (63, 339935), (105, 203961), (315, 67987)]