21005890204

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{12503}}^1\times {\mathrm{32309}}^1$

素因数の和:44829

約数の個数: 24

約数和(自身を含む): 39592415520

約数和(自身を除く): 18586525316

約数列:

[1, 2, 4, 13, 26, 52, 12503, 25006, 32309, 50012, 64618, 129236, 162539, 325078, 420017, 650156, 840034, 1680068, 403959427, 807918854, 1615837708, 5251472551, 10502945102, 21005890204]

約数ペア:

[(1, 21005890204), (2, 10502945102), (4, 5251472551), (13, 1615837708), (26, 807918854), (52, 403959427), (12503, 1680068), (25006, 840034), (32309, 650156), (50012, 420017), (64618, 325078), (129236, 162539)]