18211538

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{311}}^1$

素因数の和:422

約数の個数: 32

約数和(自身を含む): 30551040

約数和(自身を除く): 12339502

約数列:

[1, 2, 19, 23, 38, 46, 67, 134, 311, 437, 622, 874, 1273, 1541, 2546, 3082, 5909, 7153, 11818, 14306, 20837, 29279, 41674, 58558, 135907, 271814, 395903, 479251, 791806, 958502, 9105769, 18211538]

約数ペア:

[(1, 18211538), (2, 9105769), (19, 958502), (23, 791806), (38, 479251), (46, 395903), (67, 271814), (134, 135907), (311, 58558), (437, 41674), (622, 29279), (874, 20837), (1273, 14306), (1541, 11818), (2546, 7153), (3082, 5909)]