12800840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:366

約数の個数: 64

約数和(自身を含む): 31449600

約数和(自身を除く): 18648760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 103, 104, 130, 206, 239, 260, 412, 478, 515, 520, 824, 956, 1030, 1195, 1339, 1912, 2060, 2390, 2678, 3107, 4120, 4780, 5356, 6214, 6695, 9560, 10712, 12428, 13390, 15535, 24617, 24856, 26780, 31070, 49234, 53560, 62140, 98468, 123085, 124280, 196936, 246170, 320021, 492340, 640042, 984680, 1280084, 1600105, 2560168, 3200210, 6400420, 12800840]

約数ペア:

[(1, 12800840), (2, 6400420), (4, 3200210), (5, 2560168), (8, 1600105), (10, 1280084), (13, 984680), (20, 640042), (26, 492340), (40, 320021), (52, 246170), (65, 196936), (103, 124280), (104, 123085), (130, 98468), (206, 62140), (239, 53560), (260, 49234), (412, 31070), (478, 26780), (515, 24856), (520, 24617), (824, 15535), (956, 13390), (1030, 12428), (1195, 10712), (1339, 9560), (1912, 6695), (2060, 6214), (2390, 5356), (2678, 4780), (3107, 4120)]