19895788

素因数分解:

$2^2\times {\mathrm{11}}^3\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:175

約数の個数: 48

約数和(自身を含む): 39721248

約数和(自身を除く): 19825460

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 101, 121, 148, 202, 242, 404, 407, 484, 814, 1111, 1331, 1628, 2222, 2662, 3737, 4444, 4477, 5324, 7474, 8954, 12221, 14948, 17908, 24442, 41107, 48884, 49247, 82214, 98494, 134431, 164428, 196988, 268862, 452177, 537724, 904354, 1808708, 4973947, 9947894, 19895788]

約数ペア:

[(1, 19895788), (2, 9947894), (4, 4973947), (11, 1808708), (22, 904354), (37, 537724), (44, 452177), (74, 268862), (101, 196988), (121, 164428), (148, 134431), (202, 98494), (242, 82214), (404, 49247), (407, 48884), (484, 41107), (814, 24442), (1111, 17908), (1331, 14948), (1628, 12221), (2222, 8954), (2662, 7474), (3737, 5324), (4444, 4477)]