254021720

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{15527}}^1$

素因数の和:15947

約数の個数: 32

約数和(自身を含む): 572983200

約数和(自身を除く): 318961480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4090, 8180, 15527, 16360, 31054, 62108, 77635, 124216, 155270, 310540, 621080, 6350543, 12701086, 25402172, 31752715, 50804344, 63505430, 127010860, 254021720]

約数ペア:

[(1, 254021720), (2, 127010860), (4, 63505430), (5, 50804344), (8, 31752715), (10, 25402172), (20, 12701086), (40, 6350543), (409, 621080), (818, 310540), (1636, 155270), (2045, 124216), (3272, 77635), (4090, 62108), (8180, 31054), (15527, 16360)]