20757040

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{389}}^1$

素因数の和:454

約数の個数: 80

約数和(自身を含む): 52228800

約数和(自身を除く): 31471760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 29, 40, 46, 58, 80, 92, 115, 116, 145, 184, 230, 232, 290, 368, 389, 460, 464, 580, 667, 778, 920, 1160, 1334, 1556, 1840, 1945, 2320, 2668, 3112, 3335, 3890, 5336, 6224, 6670, 7780, 8947, 10672, 11281, 13340, 15560, 17894, 22562, 26680, 31120, 35788, 44735, 45124, 53360, 56405, 71576, 89470, 90248, 112810, 143152, 178940, 180496, 225620, 259463, 357880, 451240, 518926, 715760, 902480, 1037852, 1297315, 2075704, 2594630, 4151408, 5189260, 10378520, 20757040]

約数ペア:

[(1, 20757040), (2, 10378520), (4, 5189260), (5, 4151408), (8, 2594630), (10, 2075704), (16, 1297315), (20, 1037852), (23, 902480), (29, 715760), (40, 518926), (46, 451240), (58, 357880), (80, 259463), (92, 225620), (115, 180496), (116, 178940), (145, 143152), (184, 112810), (230, 90248), (232, 89470), (290, 71576), (368, 56405), (389, 53360), (460, 45124), (464, 44735), (580, 35788), (667, 31120), (778, 26680), (920, 22562), (1160, 17894), (1334, 15560), (1556, 13340), (1840, 11281), (1945, 10672), (2320, 8947), (2668, 7780), (3112, 6670), (3335, 6224), (3890, 5336)]