21489207

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10444233

約数列:

[1, 3, 17, 41, 43, 51, 123, 129, 239, 697, 717, 731, 1763, 2091, 2193, 4063, 5289, 9799, 10277, 12189, 29397, 29971, 30831, 89913, 166583, 174709, 421357, 499749, 524127, 1264071, 7163069, 21489207]

約数ペア:

[(1, 21489207), (3, 7163069), (17, 1264071), (41, 524127), (43, 499749), (51, 421357), (123, 174709), (129, 166583), (239, 89913), (697, 30831), (717, 29971), (731, 29397), (1763, 12189), (2091, 10277), (2193, 9799), (4063, 5289)]