21358930

素因数分解:

$2^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:594

約数の個数: 32

約数和(自身を含む): 39657600

約数和(自身を除く): 18298670

約数列:

[1, 2, 5, 10, 67, 71, 134, 142, 335, 355, 449, 670, 710, 898, 2245, 4490, 4757, 9514, 23785, 30083, 31879, 47570, 60166, 63758, 150415, 159395, 300830, 318790, 2135893, 4271786, 10679465, 21358930]

約数ペア:

[(1, 21358930), (2, 10679465), (5, 4271786), (10, 2135893), (67, 318790), (71, 300830), (134, 159395), (142, 150415), (335, 63758), (355, 60166), (449, 47570), (670, 31879), (710, 30083), (898, 23785), (2245, 9514), (4490, 4757)]