20745568

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:407

約数の個数: 48

約数和(自身を含む): 43470000

約数和(自身を除く): 22724432

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 149, 152, 229, 298, 304, 458, 596, 608, 916, 1192, 1832, 2384, 2831, 3664, 4351, 4768, 5662, 7328, 8702, 11324, 17404, 22648, 34121, 34808, 45296, 68242, 69616, 90592, 136484, 139232, 272968, 545936, 648299, 1091872, 1296598, 2593196, 5186392, 10372784, 20745568]

約数ペア:

[(1, 20745568), (2, 10372784), (4, 5186392), (8, 2593196), (16, 1296598), (19, 1091872), (32, 648299), (38, 545936), (76, 272968), (149, 139232), (152, 136484), (229, 90592), (298, 69616), (304, 68242), (458, 45296), (596, 34808), (608, 34121), (916, 22648), (1192, 17404), (1832, 11324), (2384, 8702), (2831, 7328), (3664, 5662), (4351, 4768)]