639520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{571}}^1$

素因数の和:593

約数の個数: 48

約数和(自身を含む): 1729728

約数和(自身を除く): 1090208

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 571, 1120, 1142, 2284, 2855, 3997, 4568, 5710, 7994, 9136, 11420, 15988, 18272, 19985, 22840, 31976, 39970, 45680, 63952, 79940, 91360, 127904, 159880, 319760, 639520]

約数ペア:

[(1, 639520), (2, 319760), (4, 159880), (5, 127904), (7, 91360), (8, 79940), (10, 63952), (14, 45680), (16, 39970), (20, 31976), (28, 22840), (32, 19985), (35, 18272), (40, 15988), (56, 11420), (70, 9136), (80, 7994), (112, 5710), (140, 4568), (160, 3997), (224, 2855), (280, 2284), (560, 1142), (571, 1120)]