21438328

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{197}}^1\times {\mathrm{223}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 41247360

約数和(自身を除く): 19809032

約数列:

[1, 2, 4, 8, 61, 122, 197, 223, 244, 394, 446, 488, 788, 892, 1576, 1784, 12017, 13603, 24034, 27206, 43931, 48068, 54412, 87862, 96136, 108824, 175724, 351448, 2679791, 5359582, 10719164, 21438328]

約数ペア:

[(1, 21438328), (2, 10719164), (4, 5359582), (8, 2679791), (61, 351448), (122, 175724), (197, 108824), (223, 96136), (244, 87862), (394, 54412), (446, 48068), (488, 43931), (788, 27206), (892, 24034), (1576, 13603), (1784, 12017)]