18913808

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:831

約数の個数: 40

約数和(自身を含む): 38563008

約数和(自身を除く): 19649200

約数列:

[1, 2, 4, 8, 16, 37, 43, 74, 86, 148, 172, 296, 344, 592, 688, 743, 1486, 1591, 2972, 3182, 5944, 6364, 11888, 12728, 25456, 27491, 31949, 54982, 63898, 109964, 127796, 219928, 255592, 439856, 511184, 1182113, 2364226, 4728452, 9456904, 18913808]

約数ペア:

[(1, 18913808), (2, 9456904), (4, 4728452), (8, 2364226), (16, 1182113), (37, 511184), (43, 439856), (74, 255592), (86, 219928), (148, 127796), (172, 109964), (296, 63898), (344, 54982), (592, 31949), (688, 27491), (743, 25456), (1486, 12728), (1591, 11888), (2972, 6364), (3182, 5944)]