81127760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{523}}^1$

素因数の和:820

約数の個数: 80

約数和(自身を含む): 216759936

約数和(自身を除く): 135632176

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 277, 280, 523, 554, 560, 1046, 1108, 1385, 1939, 2092, 2216, 2615, 2770, 3661, 3878, 4184, 4432, 5230, 5540, 7322, 7756, 8368, 9695, 10460, 11080, 14644, 15512, 18305, 19390, 20920, 22160, 29288, 31024, 36610, 38780, 41840, 58576, 73220, 77560, 144871, 146440, 155120, 289742, 292880, 579484, 724355, 1014097, 1158968, 1448710, 2028194, 2317936, 2897420, 4056388, 5070485, 5794840, 8112776, 10140970, 11589680, 16225552, 20281940, 40563880, 81127760]

約数ペア:

[(1, 81127760), (2, 40563880), (4, 20281940), (5, 16225552), (7, 11589680), (8, 10140970), (10, 8112776), (14, 5794840), (16, 5070485), (20, 4056388), (28, 2897420), (35, 2317936), (40, 2028194), (56, 1448710), (70, 1158968), (80, 1014097), (112, 724355), (140, 579484), (277, 292880), (280, 289742), (523, 155120), (554, 146440), (560, 144871), (1046, 77560), (1108, 73220), (1385, 58576), (1939, 41840), (2092, 38780), (2216, 36610), (2615, 31024), (2770, 29288), (3661, 22160), (3878, 20920), (4184, 19390), (4432, 18305), (5230, 15512), (5540, 14644), (7322, 11080), (7756, 10460), (8368, 9695)]