287484920

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{17923}}^1$

素因数の和:18335

約数の個数: 32

約数和(自身を含む): 648490320

約数和(自身を除く): 361005400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 8020, 16040, 17923, 35846, 71692, 89615, 143384, 179230, 358460, 716920, 7187123, 14374246, 28748492, 35935615, 57496984, 71871230, 143742460, 287484920]

約数ペア:

[(1, 287484920), (2, 143742460), (4, 71871230), (5, 57496984), (8, 35935615), (10, 28748492), (20, 14374246), (40, 7187123), (401, 716920), (802, 358460), (1604, 179230), (2005, 143384), (3208, 89615), (4010, 71692), (8020, 35846), (16040, 17923)]