20802704

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{971}}^1$

素因数の和:1095

約数の個数: 40

約数和(自身を含む): 43872192

約数和(自身を除く): 23069488

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 103, 104, 206, 208, 412, 824, 971, 1339, 1648, 1942, 2678, 3884, 5356, 7768, 10712, 12623, 15536, 21424, 25246, 50492, 100013, 100984, 200026, 201968, 400052, 800104, 1300169, 1600208, 2600338, 5200676, 10401352, 20802704]

約数ペア:

[(1, 20802704), (2, 10401352), (4, 5200676), (8, 2600338), (13, 1600208), (16, 1300169), (26, 800104), (52, 400052), (103, 201968), (104, 200026), (206, 100984), (208, 100013), (412, 50492), (824, 25246), (971, 21424), (1339, 15536), (1648, 12623), (1942, 10712), (2678, 7768), (3884, 5356)]