20194991997

素因数分解:

$3^1\times {\mathrm{67}}^2\times {\mathrm{71}}^1\times {\mathrm{21121}}^1$

素因数の和:21329

約数の個数: 24

約数和(自身を含む): 27720850752

約数和(自身を除く): 7525858755

約数列:

[1, 3, 67, 71, 201, 213, 4489, 4757, 13467, 14271, 21121, 63363, 318719, 956157, 1415107, 1499591, 4245321, 4498773, 94812169, 100472597, 284436507, 301417791, 6731663999, 20194991997]

約数ペア:

[(1, 20194991997), (3, 6731663999), (67, 301417791), (71, 284436507), (201, 100472597), (213, 94812169), (4489, 4498773), (4757, 4245321), (13467, 1499591), (14271, 1415107), (21121, 956157), (63363, 318719)]