51578840

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1993}}^1$

素因数の和:2651

約数の個数: 32

約数和(自身を含む): 116290080

約数和(自身を除く): 64711240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1294, 1993, 2588, 3235, 3986, 5176, 6470, 7972, 9965, 12940, 15944, 19930, 25880, 39860, 79720, 1289471, 2578942, 5157884, 6447355, 10315768, 12894710, 25789420, 51578840]

約数ペア:

[(1, 51578840), (2, 25789420), (4, 12894710), (5, 10315768), (8, 6447355), (10, 5157884), (20, 2578942), (40, 1289471), (647, 79720), (1294, 39860), (1993, 25880), (2588, 19930), (3235, 15944), (3986, 12940), (5176, 9965), (6470, 7972)]