20497412

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 19862908

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 89, 103, 172, 178, 206, 356, 412, 559, 1118, 1157, 1339, 2236, 2314, 2678, 3827, 4429, 4628, 5356, 7654, 8858, 9167, 15308, 17716, 18334, 36668, 49751, 57577, 99502, 115154, 119171, 199004, 230308, 238342, 394181, 476684, 788362, 1576724, 5124353, 10248706, 20497412]

約数ペア:

[(1, 20497412), (2, 10248706), (4, 5124353), (13, 1576724), (26, 788362), (43, 476684), (52, 394181), (86, 238342), (89, 230308), (103, 199004), (172, 119171), (178, 115154), (206, 99502), (356, 57577), (412, 49751), (559, 36668), (1118, 18334), (1157, 17716), (1339, 15308), (2236, 9167), (2314, 8858), (2678, 7654), (3827, 5356), (4429, 4628)]