18999136

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{419}}^1$

素因数の和:551

約数の個数: 48

約数和(自身を含む): 40748400

約数和(自身を除く): 21749264

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 109, 208, 218, 416, 419, 436, 838, 872, 1417, 1676, 1744, 2834, 3352, 3488, 5447, 5668, 6704, 10894, 11336, 13408, 21788, 22672, 43576, 45344, 45671, 87152, 91342, 174304, 182684, 365368, 593723, 730736, 1187446, 1461472, 2374892, 4749784, 9499568, 18999136]

約数ペア:

[(1, 18999136), (2, 9499568), (4, 4749784), (8, 2374892), (13, 1461472), (16, 1187446), (26, 730736), (32, 593723), (52, 365368), (104, 182684), (109, 174304), (208, 91342), (218, 87152), (416, 45671), (419, 45344), (436, 43576), (838, 22672), (872, 21788), (1417, 13408), (1676, 11336), (1744, 10894), (2834, 6704), (3352, 5668), (3488, 5447)]