19705712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{449}}^1$

素因数の和:681

約数の個数: 40

約数和(自身を含む): 41403600

約数和(自身を除く): 21697888

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 211, 422, 449, 844, 898, 1688, 1796, 2743, 3376, 3592, 5486, 5837, 7184, 10972, 11674, 21944, 23348, 43888, 46696, 93392, 94739, 189478, 378956, 757912, 1231607, 1515824, 2463214, 4926428, 9852856, 19705712]

約数ペア:

[(1, 19705712), (2, 9852856), (4, 4926428), (8, 2463214), (13, 1515824), (16, 1231607), (26, 757912), (52, 378956), (104, 189478), (208, 94739), (211, 93392), (422, 46696), (449, 43888), (844, 23348), (898, 21944), (1688, 11674), (1796, 10972), (2743, 7184), (3376, 5837), (3592, 5486)]