21128229

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{241}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 33454080

約数和(自身を除く): 12325851

約数列:

[1, 3, 9, 17, 27, 51, 153, 191, 241, 459, 573, 723, 1719, 2169, 3247, 4097, 5157, 6507, 9741, 12291, 29223, 36873, 46031, 87669, 110619, 138093, 414279, 782527, 1242837, 2347581, 7042743, 21128229]

約数ペア:

[(1, 21128229), (3, 7042743), (9, 2347581), (17, 1242837), (27, 782527), (51, 414279), (153, 138093), (191, 110619), (241, 87669), (459, 46031), (573, 36873), (723, 29223), (1719, 12291), (2169, 9741), (3247, 6507), (4097, 5157)]