16820360

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:470

約数の個数: 64

約数和(自身を含む): 40435200

約数和(自身を除く): 23614840

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 47, 92, 94, 115, 184, 188, 230, 235, 376, 389, 460, 470, 778, 920, 940, 1081, 1556, 1880, 1945, 2162, 3112, 3890, 4324, 5405, 7780, 8648, 8947, 10810, 15560, 17894, 18283, 21620, 35788, 36566, 43240, 44735, 71576, 73132, 89470, 91415, 146264, 178940, 182830, 357880, 365660, 420509, 731320, 841018, 1682036, 2102545, 3364072, 4205090, 8410180, 16820360]

約数ペア:

[(1, 16820360), (2, 8410180), (4, 4205090), (5, 3364072), (8, 2102545), (10, 1682036), (20, 841018), (23, 731320), (40, 420509), (46, 365660), (47, 357880), (92, 182830), (94, 178940), (115, 146264), (184, 91415), (188, 89470), (230, 73132), (235, 71576), (376, 44735), (389, 43240), (460, 36566), (470, 35788), (778, 21620), (920, 18283), (940, 17894), (1081, 15560), (1556, 10810), (1880, 8947), (1945, 8648), (2162, 7780), (3112, 5405), (3890, 4324)]