820170040

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{156521}}^1$

素因数の和:156663

約数の個数: 32

約数和(自身を含む): 1859481360

約数和(自身を除く): 1039311320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 156521, 313042, 626084, 782605, 1252168, 1565210, 3130420, 6260840, 20504251, 41008502, 82017004, 102521255, 164034008, 205042510, 410085020, 820170040]

約数ペア:

[(1, 820170040), (2, 410085020), (4, 205042510), (5, 164034008), (8, 102521255), (10, 82017004), (20, 41008502), (40, 20504251), (131, 6260840), (262, 3130420), (524, 1565210), (655, 1252168), (1048, 782605), (1310, 626084), (2620, 313042), (5240, 156521)]