21685377

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 34209792

約数和(自身を除く): 12524415

約数列:

[1, 3, 7, 21, 47, 127, 141, 173, 329, 381, 519, 889, 987, 1211, 2667, 3633, 5969, 8131, 17907, 21971, 24393, 41783, 56917, 65913, 125349, 153797, 170751, 461391, 1032637, 3097911, 7228459, 21685377]

約数ペア:

[(1, 21685377), (3, 7228459), (7, 3097911), (21, 1032637), (47, 461391), (127, 170751), (141, 153797), (173, 125349), (329, 65913), (381, 56917), (519, 41783), (889, 24393), (987, 21971), (1211, 17907), (2667, 8131), (3633, 5969)]