19729890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{853}}^1$

素因数の和:1123

約数の個数: 48

約数和(自身を含む): 51557688

約数和(自身を除く): 31827798

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 257, 514, 771, 853, 1285, 1542, 1706, 2313, 2559, 2570, 3855, 4265, 4626, 5118, 7677, 7710, 8530, 11565, 12795, 15354, 23130, 25590, 38385, 76770, 219221, 438442, 657663, 1096105, 1315326, 1972989, 2192210, 3288315, 3945978, 6576630, 9864945, 19729890]

約数ペア:

[(1, 19729890), (2, 9864945), (3, 6576630), (5, 3945978), (6, 3288315), (9, 2192210), (10, 1972989), (15, 1315326), (18, 1096105), (30, 657663), (45, 438442), (90, 219221), (257, 76770), (514, 38385), (771, 25590), (853, 23130), (1285, 15354), (1542, 12795), (1706, 11565), (2313, 8530), (2559, 7710), (2570, 7677), (3855, 5118), (4265, 4626)]