21377601

素因数分解:

$3^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1019}}^1$

素因数の和:1075

約数の個数: 40

約数和(自身を含む): 37519680

約数和(自身を除く): 16142079

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 81, 111, 189, 259, 333, 567, 777, 999, 1019, 2331, 2997, 3057, 6993, 7133, 9171, 20979, 21399, 27513, 37703, 64197, 82539, 113109, 192591, 263921, 339327, 577773, 791763, 1017981, 2375289, 3053943, 7125867, 21377601]

約数ペア:

[(1, 21377601), (3, 7125867), (7, 3053943), (9, 2375289), (21, 1017981), (27, 791763), (37, 577773), (63, 339327), (81, 263921), (111, 192591), (189, 113109), (259, 82539), (333, 64197), (567, 37703), (777, 27513), (999, 21399), (1019, 20979), (2331, 9171), (2997, 7133), (3057, 6993)]