20053904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1439}}^1$

素因数の和:1527

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 22443376

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1439, 1742, 2878, 3484, 5756, 6968, 11512, 13936, 18707, 23024, 37414, 74828, 96413, 149656, 192826, 299312, 385652, 771304, 1253369, 1542608, 2506738, 5013476, 10026952, 20053904]

約数ペア:

[(1, 20053904), (2, 10026952), (4, 5013476), (8, 2506738), (13, 1542608), (16, 1253369), (26, 771304), (52, 385652), (67, 299312), (104, 192826), (134, 149656), (208, 96413), (268, 74828), (536, 37414), (871, 23024), (1072, 18707), (1439, 13936), (1742, 11512), (2878, 6968), (3484, 5756)]