12640520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{641}}^1$

素因数の和:698

約数の個数: 64

約数和(自身を含む): 31201200

約数和(自身を除く): 18560680

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 29, 34, 40, 58, 68, 85, 116, 136, 145, 170, 232, 290, 340, 493, 580, 641, 680, 986, 1160, 1282, 1972, 2465, 2564, 3205, 3944, 4930, 5128, 6410, 9860, 10897, 12820, 18589, 19720, 21794, 25640, 37178, 43588, 54485, 74356, 87176, 92945, 108970, 148712, 185890, 217940, 316013, 371780, 435880, 632026, 743560, 1264052, 1580065, 2528104, 3160130, 6320260, 12640520]

約数ペア:

[(1, 12640520), (2, 6320260), (4, 3160130), (5, 2528104), (8, 1580065), (10, 1264052), (17, 743560), (20, 632026), (29, 435880), (34, 371780), (40, 316013), (58, 217940), (68, 185890), (85, 148712), (116, 108970), (136, 92945), (145, 87176), (170, 74356), (232, 54485), (290, 43588), (340, 37178), (493, 25640), (580, 21794), (641, 19720), (680, 18589), (986, 12820), (1160, 10897), (1282, 9860), (1972, 6410), (2465, 5128), (2564, 4930), (3205, 3944)]