1687640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1361}}^1$

素因数の和:1403

約数の個数: 32

約数和(自身を含む): 3922560

約数和(自身を除く): 2234920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 1361, 2722, 5444, 6805, 10888, 13610, 27220, 42191, 54440, 84382, 168764, 210955, 337528, 421910, 843820, 1687640]

約数ペア:

[(1, 1687640), (2, 843820), (4, 421910), (5, 337528), (8, 210955), (10, 168764), (20, 84382), (31, 54440), (40, 42191), (62, 27220), (124, 13610), (155, 10888), (248, 6805), (310, 5444), (620, 2722), (1240, 1361)]