21208077

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 14172723

約数列:

[1, 3, 9, 11, 29, 33, 83, 87, 89, 99, 249, 261, 267, 319, 747, 801, 913, 957, 979, 2407, 2581, 2739, 2871, 2937, 7221, 7387, 7743, 8217, 8811, 21663, 22161, 23229, 26477, 28391, 66483, 79431, 81257, 85173, 214223, 238293, 243771, 255519, 642669, 731313, 1928007, 2356453, 7069359, 21208077]

約数ペア:

[(1, 21208077), (3, 7069359), (9, 2356453), (11, 1928007), (29, 731313), (33, 642669), (83, 255519), (87, 243771), (89, 238293), (99, 214223), (249, 85173), (261, 81257), (267, 79431), (319, 66483), (747, 28391), (801, 26477), (913, 23229), (957, 22161), (979, 21663), (2407, 8811), (2581, 8217), (2739, 7743), (2871, 7387), (2937, 7221)]