40020320

素因数分解:

$2^5\times 5^1\times {\mathrm{389}}^1\times {\mathrm{643}}^1$

素因数の和:1047

約数の個数: 48

約数和(自身を含む): 94938480

約数和(自身を除く): 54918160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 389, 643, 778, 1286, 1556, 1945, 2572, 3112, 3215, 3890, 5144, 6224, 6430, 7780, 10288, 12448, 12860, 15560, 20576, 25720, 31120, 51440, 62240, 102880, 250127, 500254, 1000508, 1250635, 2001016, 2501270, 4002032, 5002540, 8004064, 10005080, 20010160, 40020320]

約数ペア:

[(1, 40020320), (2, 20010160), (4, 10005080), (5, 8004064), (8, 5002540), (10, 4002032), (16, 2501270), (20, 2001016), (32, 1250635), (40, 1000508), (80, 500254), (160, 250127), (389, 102880), (643, 62240), (778, 51440), (1286, 31120), (1556, 25720), (1945, 20576), (2572, 15560), (3112, 12860), (3215, 12448), (3890, 10288), (5144, 7780), (6224, 6430)]