257679440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103903}}^1$

素因数の和:103947

約数の個数: 40

約数和(自身を含む): 618436608

約数和(自身を除く): 360757168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 103903, 207806, 415612, 519515, 831224, 1039030, 1662448, 2078060, 3220993, 4156120, 6441986, 8312240, 12883972, 16104965, 25767944, 32209930, 51535888, 64419860, 128839720, 257679440]

約数ペア:

[(1, 257679440), (2, 128839720), (4, 64419860), (5, 51535888), (8, 32209930), (10, 25767944), (16, 16104965), (20, 12883972), (31, 8312240), (40, 6441986), (62, 4156120), (80, 3220993), (124, 2078060), (155, 1662448), (248, 1039030), (310, 831224), (496, 519515), (620, 415612), (1240, 207806), (2480, 103903)]