21975723

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1669}}^1$

素因数の和:1712

約数の個数: 48

約数和(自身を含む): 41683200

約数和(自身を除く): 19707477

約数列:

[1, 3, 7, 9, 11, 19, 21, 33, 57, 63, 77, 99, 133, 171, 209, 231, 399, 627, 693, 1197, 1463, 1669, 1881, 4389, 5007, 11683, 13167, 15021, 18359, 31711, 35049, 55077, 95133, 105147, 128513, 165231, 221977, 285399, 348821, 385539, 665931, 1046463, 1156617, 1997793, 2441747, 3139389, 7325241, 21975723]

約数ペア:

[(1, 21975723), (3, 7325241), (7, 3139389), (9, 2441747), (11, 1997793), (19, 1156617), (21, 1046463), (33, 665931), (57, 385539), (63, 348821), (77, 285399), (99, 221977), (133, 165231), (171, 128513), (209, 105147), (231, 95133), (399, 55077), (627, 35049), (693, 31711), (1197, 18359), (1463, 15021), (1669, 13167), (1881, 11683), (4389, 5007)]