856840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{691}}^1$

素因数の和:733

約数の個数: 32

約数和(自身を含む): 1992960

約数和(自身を除く): 1136120

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 691, 1240, 1382, 2764, 3455, 5528, 6910, 13820, 21421, 27640, 42842, 85684, 107105, 171368, 214210, 428420, 856840]

約数ペア:

[(1, 856840), (2, 428420), (4, 214210), (5, 171368), (8, 107105), (10, 85684), (20, 42842), (31, 27640), (40, 21421), (62, 13820), (124, 6910), (155, 5528), (248, 3455), (310, 2764), (620, 1382), (691, 1240)]