21996051

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 37997568

約数和(自身を除く): 16001517

約数列:

[1, 3, 7, 11, 21, 33, 49, 61, 77, 147, 183, 223, 231, 427, 539, 669, 671, 1281, 1561, 1617, 2013, 2453, 2989, 4683, 4697, 7359, 8967, 10927, 13603, 14091, 17171, 32781, 32879, 40809, 51513, 95221, 98637, 120197, 149633, 285663, 360591, 448899, 666547, 1047431, 1999641, 3142293, 7332017, 21996051]

約数ペア:

[(1, 21996051), (3, 7332017), (7, 3142293), (11, 1999641), (21, 1047431), (33, 666547), (49, 448899), (61, 360591), (77, 285663), (147, 149633), (183, 120197), (223, 98637), (231, 95221), (427, 51513), (539, 40809), (669, 32879), (671, 32781), (1281, 17171), (1561, 14091), (1617, 13603), (2013, 10927), (2453, 8967), (2989, 7359), (4683, 4697)]