21275721

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{241}}^1\times {\mathrm{577}}^1$

素因数の和:841

約数の個数: 24

約数和(自身を含む): 32730984

約数和(自身を除く): 11455263

約数列:

[1, 3, 9, 17, 51, 153, 241, 577, 723, 1731, 2169, 4097, 5193, 9809, 12291, 29427, 36873, 88281, 139057, 417171, 1251513, 2363969, 7091907, 21275721]

約数ペア:

[(1, 21275721), (3, 7091907), (9, 2363969), (17, 1251513), (51, 417171), (153, 139057), (241, 88281), (577, 36873), (723, 29427), (1731, 12291), (2169, 9809), (4097, 5193)]