12981640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{653}}^1$

素因数の和:742

約数の個数: 64

約数和(自身を含む): 33903360

約数和(自身を除く): 20921720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 653, 710, 994, 1306, 1420, 1988, 2485, 2612, 2840, 3265, 3976, 4571, 4970, 5224, 6530, 9142, 9940, 13060, 18284, 19880, 22855, 26120, 36568, 45710, 46363, 91420, 92726, 182840, 185452, 231815, 324541, 370904, 463630, 649082, 927260, 1298164, 1622705, 1854520, 2596328, 3245410, 6490820, 12981640]

約数ペア:

[(1, 12981640), (2, 6490820), (4, 3245410), (5, 2596328), (7, 1854520), (8, 1622705), (10, 1298164), (14, 927260), (20, 649082), (28, 463630), (35, 370904), (40, 324541), (56, 231815), (70, 185452), (71, 182840), (140, 92726), (142, 91420), (280, 46363), (284, 45710), (355, 36568), (497, 26120), (568, 22855), (653, 19880), (710, 18284), (994, 13060), (1306, 9940), (1420, 9142), (1988, 6530), (2485, 5224), (2612, 4970), (2840, 4571), (3265, 3976)]