131999320

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{21019}}^1$

素因数の和:21187

約数の個数: 32

約数和(自身を含む): 298904400

約数和(自身を除く): 166905080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 21019, 42038, 84076, 105095, 168152, 210190, 420380, 840760, 3299983, 6599966, 13199932, 16499915, 26399864, 32999830, 65999660, 131999320]

約数ペア:

[(1, 131999320), (2, 65999660), (4, 32999830), (5, 26399864), (8, 16499915), (10, 13199932), (20, 6599966), (40, 3299983), (157, 840760), (314, 420380), (628, 210190), (785, 168152), (1256, 105095), (1570, 84076), (3140, 42038), (6280, 21019)]