19687960

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3541}}^1$

素因数の和:3691

約数の個数: 32

約数和(自身を含む): 44629200

約数和(自身を除く): 24941240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3541, 5560, 7082, 14164, 17705, 28328, 35410, 70820, 141640, 492199, 984398, 1968796, 2460995, 3937592, 4921990, 9843980, 19687960]

約数ペア:

[(1, 19687960), (2, 9843980), (4, 4921990), (5, 3937592), (8, 2460995), (10, 1968796), (20, 984398), (40, 492199), (139, 141640), (278, 70820), (556, 35410), (695, 28328), (1112, 17705), (1390, 14164), (2780, 7082), (3541, 5560)]