1286420

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{491}}^1$

素因数の和:631

約数の個数: 24

約数和(自身を含む): 2727648

約数和(自身を除く): 1441228

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 491, 524, 655, 982, 1310, 1964, 2455, 2620, 4910, 9820, 64321, 128642, 257284, 321605, 643210, 1286420]

約数ペア:

[(1, 1286420), (2, 643210), (4, 321605), (5, 257284), (10, 128642), (20, 64321), (131, 9820), (262, 4910), (491, 2620), (524, 2455), (655, 1964), (982, 1310)]