28428280

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{5113}}^1$

素因数の和:5263

約数の個数: 32

約数和(自身を含む): 64436400

約数和(自身を除く): 36008120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 5113, 5560, 10226, 20452, 25565, 40904, 51130, 102260, 204520, 710707, 1421414, 2842828, 3553535, 5685656, 7107070, 14214140, 28428280]

約数ペア:

[(1, 28428280), (2, 14214140), (4, 7107070), (5, 5685656), (8, 3553535), (10, 2842828), (20, 1421414), (40, 710707), (139, 204520), (278, 102260), (556, 51130), (695, 40904), (1112, 25565), (1390, 20452), (2780, 10226), (5113, 5560)]