21805416

素因数分解:

$2^3\times 3^3\times {\mathrm{157}}^1\times {\mathrm{643}}^1$

素因数の和:815

約数の個数: 64

約数和(自身を含む): 61051200

約数和(自身を除く): 39245784

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 157, 216, 314, 471, 628, 643, 942, 1256, 1286, 1413, 1884, 1929, 2572, 2826, 3768, 3858, 4239, 5144, 5652, 5787, 7716, 8478, 11304, 11574, 15432, 16956, 17361, 23148, 33912, 34722, 46296, 69444, 100951, 138888, 201902, 302853, 403804, 605706, 807608, 908559, 1211412, 1817118, 2422824, 2725677, 3634236, 5451354, 7268472, 10902708, 21805416]

約数ペア:

[(1, 21805416), (2, 10902708), (3, 7268472), (4, 5451354), (6, 3634236), (8, 2725677), (9, 2422824), (12, 1817118), (18, 1211412), (24, 908559), (27, 807608), (36, 605706), (54, 403804), (72, 302853), (108, 201902), (157, 138888), (216, 100951), (314, 69444), (471, 46296), (628, 34722), (643, 33912), (942, 23148), (1256, 17361), (1286, 16956), (1413, 15432), (1884, 11574), (1929, 11304), (2572, 8478), (2826, 7716), (3768, 5787), (3858, 5652), (4239, 5144)]