638615720

素因数分解:

$2^3\times 5^1\times {\mathrm{233}}^1\times {\mathrm{68521}}^1$

素因数の和:68765

約数の個数: 32

約数和(自身を含む): 1443073320

約数和(自身を除く): 804457600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 233, 466, 932, 1165, 1864, 2330, 4660, 9320, 68521, 137042, 274084, 342605, 548168, 685210, 1370420, 2740840, 15965393, 31930786, 63861572, 79826965, 127723144, 159653930, 319307860, 638615720]

約数ペア:

[(1, 638615720), (2, 319307860), (4, 159653930), (5, 127723144), (8, 79826965), (10, 63861572), (20, 31930786), (40, 15965393), (233, 2740840), (466, 1370420), (932, 685210), (1165, 548168), (1864, 342605), (2330, 274084), (4660, 137042), (9320, 68521)]