18219080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{881}}^1$

素因数の和:950

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 27503800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 881, 940, 1034, 1762, 1880, 2068, 2585, 3524, 4136, 4405, 5170, 7048, 8810, 9691, 10340, 17620, 19382, 20680, 35240, 38764, 41407, 48455, 77528, 82814, 96910, 165628, 193820, 207035, 331256, 387640, 414070, 455477, 828140, 910954, 1656280, 1821908, 2277385, 3643816, 4554770, 9109540, 18219080]

約数ペア:

[(1, 18219080), (2, 9109540), (4, 4554770), (5, 3643816), (8, 2277385), (10, 1821908), (11, 1656280), (20, 910954), (22, 828140), (40, 455477), (44, 414070), (47, 387640), (55, 331256), (88, 207035), (94, 193820), (110, 165628), (188, 96910), (220, 82814), (235, 77528), (376, 48455), (440, 41407), (470, 38764), (517, 35240), (881, 20680), (940, 19382), (1034, 17620), (1762, 10340), (1880, 9691), (2068, 8810), (2585, 7048), (3524, 5170), (4136, 4405)]