20538261

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{241}}^1\times {\mathrm{557}}^1$

素因数の和:821

約数の個数: 24

約数和(自身を含む): 31598424

約数和(自身を除く): 11060163

約数列:

[1, 3, 9, 17, 51, 153, 241, 557, 723, 1671, 2169, 4097, 5013, 9469, 12291, 28407, 36873, 85221, 134237, 402711, 1208133, 2282029, 6846087, 20538261]

約数ペア:

[(1, 20538261), (3, 6846087), (9, 2282029), (17, 1208133), (51, 402711), (153, 134237), (241, 85221), (557, 36873), (723, 28407), (1671, 12291), (2169, 9469), (4097, 5013)]