20838727

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 27095040

約数和(自身を除く): 6256313

約数列:

[1, 7, 13, 31, 83, 89, 91, 217, 403, 581, 623, 1079, 1157, 2573, 2759, 2821, 7387, 7553, 8099, 18011, 19313, 33449, 35867, 51709, 96031, 228997, 234143, 251069, 672217, 1602979, 2976961, 20838727]

約数ペア:

[(1, 20838727), (7, 2976961), (13, 1602979), (31, 672217), (83, 251069), (89, 234143), (91, 228997), (217, 96031), (403, 51709), (581, 35867), (623, 33449), (1079, 19313), (1157, 18011), (2573, 8099), (2759, 7553), (2821, 7387)]