21748840

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18749}}^1$

素因数の和:18789

約数の個数: 32

約数和(自身を含む): 50625000

約数和(自身を除く): 28876160

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18749, 37498, 74996, 93745, 149992, 187490, 374980, 543721, 749960, 1087442, 2174884, 2718605, 4349768, 5437210, 10874420, 21748840]

約数ペア:

[(1, 21748840), (2, 10874420), (4, 5437210), (5, 4349768), (8, 2718605), (10, 2174884), (20, 1087442), (29, 749960), (40, 543721), (58, 374980), (116, 187490), (145, 149992), (232, 93745), (290, 74996), (580, 37498), (1160, 18749)]