19657240

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{977}}^1$

素因数の和:1491

約数の個数: 32

約数和(自身を含む): 44362080

約数和(自身を除く): 24704840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 977, 1006, 1954, 2012, 2515, 3908, 4024, 4885, 5030, 7816, 9770, 10060, 19540, 20120, 39080, 491431, 982862, 1965724, 2457155, 3931448, 4914310, 9828620, 19657240]

約数ペア:

[(1, 19657240), (2, 9828620), (4, 4914310), (5, 3931448), (8, 2457155), (10, 1965724), (20, 982862), (40, 491431), (503, 39080), (977, 20120), (1006, 19540), (1954, 10060), (2012, 9770), (2515, 7816), (3908, 5030), (4024, 4885)]