18903892

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 39529728

約数和(自身を除く): 20625836

約数列:

[1, 2, 4, 7, 14, 28, 37, 71, 74, 142, 148, 257, 259, 284, 497, 514, 518, 994, 1028, 1036, 1799, 1988, 2627, 3598, 5254, 7196, 9509, 10508, 18247, 18389, 19018, 36494, 36778, 38036, 66563, 72988, 73556, 127729, 133126, 255458, 266252, 510916, 675139, 1350278, 2700556, 4725973, 9451946, 18903892]

約数ペア:

[(1, 18903892), (2, 9451946), (4, 4725973), (7, 2700556), (14, 1350278), (28, 675139), (37, 510916), (71, 266252), (74, 255458), (142, 133126), (148, 127729), (257, 73556), (259, 72988), (284, 66563), (497, 38036), (514, 36778), (518, 36494), (994, 19018), (1028, 18389), (1036, 18247), (1799, 10508), (1988, 9509), (2627, 7196), (3598, 5254)]