20517651

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18189549

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 71, 77, 99, 139, 189, 213, 231, 297, 417, 497, 639, 693, 781, 973, 1251, 1491, 1529, 1917, 2079, 2343, 2919, 3753, 4473, 4587, 5467, 7029, 8757, 9869, 10703, 13419, 13761, 16401, 21087, 26271, 29607, 32109, 41283, 49203, 69083, 88821, 96327, 108559, 147609, 207249, 266463, 288981, 325677, 621747, 759913, 977031, 1865241, 2279739, 2931093, 6839217, 20517651]

約数ペア:

[(1, 20517651), (3, 6839217), (7, 2931093), (9, 2279739), (11, 1865241), (21, 977031), (27, 759913), (33, 621747), (63, 325677), (71, 288981), (77, 266463), (99, 207249), (139, 147609), (189, 108559), (213, 96327), (231, 88821), (297, 69083), (417, 49203), (497, 41283), (639, 32109), (693, 29607), (781, 26271), (973, 21087), (1251, 16401), (1491, 13761), (1529, 13419), (1917, 10703), (2079, 9869), (2343, 8757), (2919, 7029), (3753, 5467), (4473, 4587)]