1810420

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{691}}^1$

素因数の和:831

約数の個数: 24

約数和(自身を含む): 3836448

約数和(自身を除く): 2026028

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 691, 1310, 1382, 2620, 2764, 3455, 6910, 13820, 90521, 181042, 362084, 452605, 905210, 1810420]

約数ペア:

[(1, 1810420), (2, 905210), (4, 452605), (5, 362084), (10, 181042), (20, 90521), (131, 13820), (262, 6910), (524, 3455), (655, 2764), (691, 2620), (1310, 1382)]