19984657

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 6142703

約数列:

[1, 7, 11, 53, 59, 77, 83, 371, 413, 581, 583, 649, 913, 3127, 4081, 4399, 4543, 4897, 6391, 21889, 30793, 34279, 34397, 48389, 53867, 240779, 259541, 338723, 377069, 1816787, 2854951, 19984657]

約数ペア:

[(1, 19984657), (7, 2854951), (11, 1816787), (53, 377069), (59, 338723), (77, 259541), (83, 240779), (371, 53867), (413, 48389), (581, 34397), (583, 34279), (649, 30793), (913, 21889), (3127, 6391), (4081, 4897), (4399, 4543)]