78749720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281249}}^1$

素因数の和:281267

約数の個数: 32

約数和(自身を含む): 202500000

約数和(自身を除く): 123750280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281249, 562498, 1124996, 1406245, 1968743, 2249992, 2812490, 3937486, 5624980, 7874972, 9843715, 11249960, 15749944, 19687430, 39374860, 78749720]

約数ペア:

[(1, 78749720), (2, 39374860), (4, 19687430), (5, 15749944), (7, 11249960), (8, 9843715), (10, 7874972), (14, 5624980), (20, 3937486), (28, 2812490), (35, 2249992), (40, 1968743), (56, 1406245), (70, 1124996), (140, 562498), (280, 281249)]