21691872

素因数分解:

$2^5\times 3^2\times {\mathrm{109}}^1\times {\mathrm{691}}^1$

素因数の和:816

約数の個数: 72

約数和(自身を含む): 62342280

約数和(自身を除く): 40650408

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 109, 144, 218, 288, 327, 436, 654, 691, 872, 981, 1308, 1382, 1744, 1962, 2073, 2616, 2764, 3488, 3924, 4146, 5232, 5528, 6219, 7848, 8292, 10464, 11056, 12438, 15696, 16584, 22112, 24876, 31392, 33168, 49752, 66336, 75319, 99504, 150638, 199008, 225957, 301276, 451914, 602552, 677871, 903828, 1205104, 1355742, 1807656, 2410208, 2711484, 3615312, 5422968, 7230624, 10845936, 21691872]

約数ペア:

[(1, 21691872), (2, 10845936), (3, 7230624), (4, 5422968), (6, 3615312), (8, 2711484), (9, 2410208), (12, 1807656), (16, 1355742), (18, 1205104), (24, 903828), (32, 677871), (36, 602552), (48, 451914), (72, 301276), (96, 225957), (109, 199008), (144, 150638), (218, 99504), (288, 75319), (327, 66336), (436, 49752), (654, 33168), (691, 31392), (872, 24876), (981, 22112), (1308, 16584), (1382, 15696), (1744, 12438), (1962, 11056), (2073, 10464), (2616, 8292), (2764, 7848), (3488, 6219), (3924, 5528), (4146, 5232)]