20459120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{347}}^1$

素因数の和:438

約数の個数: 80

約数和(自身を含む): 52818048

約数和(自身を除く): 32358928

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 67, 80, 88, 110, 134, 176, 220, 268, 335, 347, 440, 536, 670, 694, 737, 880, 1072, 1340, 1388, 1474, 1735, 2680, 2776, 2948, 3470, 3685, 3817, 5360, 5552, 5896, 6940, 7370, 7634, 11792, 13880, 14740, 15268, 19085, 23249, 27760, 29480, 30536, 38170, 46498, 58960, 61072, 76340, 92996, 116245, 152680, 185992, 232490, 255739, 305360, 371984, 464980, 511478, 929960, 1022956, 1278695, 1859920, 2045912, 2557390, 4091824, 5114780, 10229560, 20459120]

約数ペア:

[(1, 20459120), (2, 10229560), (4, 5114780), (5, 4091824), (8, 2557390), (10, 2045912), (11, 1859920), (16, 1278695), (20, 1022956), (22, 929960), (40, 511478), (44, 464980), (55, 371984), (67, 305360), (80, 255739), (88, 232490), (110, 185992), (134, 152680), (176, 116245), (220, 92996), (268, 76340), (335, 61072), (347, 58960), (440, 46498), (536, 38170), (670, 30536), (694, 29480), (737, 27760), (880, 23249), (1072, 19085), (1340, 15268), (1388, 14740), (1474, 13880), (1735, 11792), (2680, 7634), (2776, 7370), (2948, 6940), (3470, 5896), (3685, 5552), (3817, 5360)]