21005784

素因数分解:

$2^3\times 3^3\times {\mathrm{79}}^1\times {\mathrm{1231}}^1$

素因数の和:1325

約数の個数: 64

約数和(自身を含む): 59136000

約数和(自身を除く): 38130216

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 79, 108, 158, 216, 237, 316, 474, 632, 711, 948, 1231, 1422, 1896, 2133, 2462, 2844, 3693, 4266, 4924, 5688, 7386, 8532, 9848, 11079, 14772, 17064, 22158, 29544, 33237, 44316, 66474, 88632, 97249, 132948, 194498, 265896, 291747, 388996, 583494, 777992, 875241, 1166988, 1750482, 2333976, 2625723, 3500964, 5251446, 7001928, 10502892, 21005784]

約数ペア:

[(1, 21005784), (2, 10502892), (3, 7001928), (4, 5251446), (6, 3500964), (8, 2625723), (9, 2333976), (12, 1750482), (18, 1166988), (24, 875241), (27, 777992), (36, 583494), (54, 388996), (72, 291747), (79, 265896), (108, 194498), (158, 132948), (216, 97249), (237, 88632), (316, 66474), (474, 44316), (632, 33237), (711, 29544), (948, 22158), (1231, 17064), (1422, 14772), (1896, 11079), (2133, 9848), (2462, 8532), (2844, 7386), (3693, 5688), (4266, 4924)]