20670741

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{179}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18036459

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 47, 63, 91, 117, 141, 179, 189, 273, 329, 351, 423, 537, 611, 819, 987, 1253, 1269, 1611, 1833, 2327, 2457, 2961, 3759, 4277, 4833, 5499, 6981, 8413, 8883, 11277, 12831, 16289, 16497, 20943, 25239, 33831, 38493, 48867, 58891, 62829, 75717, 109369, 115479, 146601, 176673, 227151, 328107, 439803, 530019, 765583, 984321, 1590057, 2296749, 2952963, 6890247, 20670741]

約数ペア:

[(1, 20670741), (3, 6890247), (7, 2952963), (9, 2296749), (13, 1590057), (21, 984321), (27, 765583), (39, 530019), (47, 439803), (63, 328107), (91, 227151), (117, 176673), (141, 146601), (179, 115479), (189, 109369), (273, 75717), (329, 62829), (351, 58891), (423, 48867), (537, 38493), (611, 33831), (819, 25239), (987, 20943), (1253, 16497), (1269, 16289), (1611, 12831), (1833, 11277), (2327, 8883), (2457, 8413), (2961, 6981), (3759, 5499), (4277, 4833)]