19656520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{367}}^1$

素因数の和:494

約数の個数: 64

約数和(自身を含む): 48222720

約数和(自身を除く): 28566200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 103, 104, 130, 206, 260, 367, 412, 515, 520, 734, 824, 1030, 1339, 1468, 1835, 2060, 2678, 2936, 3670, 4120, 4771, 5356, 6695, 7340, 9542, 10712, 13390, 14680, 19084, 23855, 26780, 37801, 38168, 47710, 53560, 75602, 95420, 151204, 189005, 190840, 302408, 378010, 491413, 756020, 982826, 1512040, 1965652, 2457065, 3931304, 4914130, 9828260, 19656520]

約数ペア:

[(1, 19656520), (2, 9828260), (4, 4914130), (5, 3931304), (8, 2457065), (10, 1965652), (13, 1512040), (20, 982826), (26, 756020), (40, 491413), (52, 378010), (65, 302408), (103, 190840), (104, 189005), (130, 151204), (206, 95420), (260, 75602), (367, 53560), (412, 47710), (515, 38168), (520, 37801), (734, 26780), (824, 23855), (1030, 19084), (1339, 14680), (1468, 13390), (1835, 10712), (2060, 9542), (2678, 7340), (2936, 6695), (3670, 5356), (4120, 4771)]