18894440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^2\times {\mathrm{281}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 43729740

約数和(自身を除く): 24835300

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 281, 328, 410, 562, 820, 1124, 1405, 1640, 1681, 2248, 2810, 3362, 5620, 6724, 8405, 11240, 11521, 13448, 16810, 23042, 33620, 46084, 57605, 67240, 92168, 115210, 230420, 460840, 472361, 944722, 1889444, 2361805, 3778888, 4723610, 9447220, 18894440]

約数ペア:

[(1, 18894440), (2, 9447220), (4, 4723610), (5, 3778888), (8, 2361805), (10, 1889444), (20, 944722), (40, 472361), (41, 460840), (82, 230420), (164, 115210), (205, 92168), (281, 67240), (328, 57605), (410, 46084), (562, 33620), (820, 23042), (1124, 16810), (1405, 13448), (1640, 11521), (1681, 11240), (2248, 8405), (2810, 6724), (3362, 5620)]