20389523

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{397}}^1$

素因数の和:467

約数の個数: 32

約数和(自身を含む): 27509760

約数和(自身を除く): 7120237

約数列:

[1, 7, 11, 23, 29, 77, 161, 203, 253, 319, 397, 667, 1771, 2233, 2779, 4367, 4669, 7337, 9131, 11513, 30569, 51359, 63917, 80591, 100441, 126643, 264799, 703087, 886501, 1853593, 2912789, 20389523]

約数ペア:

[(1, 20389523), (7, 2912789), (11, 1853593), (23, 886501), (29, 703087), (77, 264799), (161, 126643), (203, 100441), (253, 80591), (319, 63917), (397, 51359), (667, 30569), (1771, 11513), (2233, 9131), (2779, 7337), (4367, 4669)]