28139900

素因数分解:

$2^2\times 5^2\times {\mathrm{439}}^1\times {\mathrm{641}}^1$

素因数の和:1094

約数の個数: 36

約数和(自身を含む): 61298160

約数和(自身を除く): 33158260

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 439, 641, 878, 1282, 1756, 2195, 2564, 3205, 4390, 6410, 8780, 10975, 12820, 16025, 21950, 32050, 43900, 64100, 281399, 562798, 1125596, 1406995, 2813990, 5627980, 7034975, 14069950, 28139900]

約数ペア:

[(1, 28139900), (2, 14069950), (4, 7034975), (5, 5627980), (10, 2813990), (20, 1406995), (25, 1125596), (50, 562798), (100, 281399), (439, 64100), (641, 43900), (878, 32050), (1282, 21950), (1756, 16025), (2195, 12820), (2564, 10975), (3205, 8780), (4390, 6410)]