21852664

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{487}}^1$

素因数の和:643

約数の個数: 32

約数和(自身を含む): 42163200

約数和(自身を除く): 20310536

約数列:

[1, 2, 4, 8, 71, 79, 142, 158, 284, 316, 487, 568, 632, 974, 1948, 3896, 5609, 11218, 22436, 34577, 38473, 44872, 69154, 76946, 138308, 153892, 276616, 307784, 2731583, 5463166, 10926332, 21852664]

約数ペア:

[(1, 21852664), (2, 10926332), (4, 5463166), (8, 2731583), (71, 307784), (79, 276616), (142, 153892), (158, 138308), (284, 76946), (316, 69154), (487, 44872), (568, 38473), (632, 34577), (974, 22436), (1948, 11218), (3896, 5609)]