28266280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{643}}^1$

素因数の和:818

約数の個数: 64

約数和(自身を含む): 73261440

約数和(自身を除く): 44995160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 628, 643, 785, 1099, 1256, 1286, 1570, 2198, 2572, 3140, 3215, 4396, 4501, 5144, 5495, 6280, 6430, 8792, 9002, 10990, 12860, 18004, 21980, 22505, 25720, 36008, 43960, 45010, 90020, 100951, 180040, 201902, 403804, 504755, 706657, 807608, 1009510, 1413314, 2019020, 2826628, 3533285, 4038040, 5653256, 7066570, 14133140, 28266280]

約数ペア:

[(1, 28266280), (2, 14133140), (4, 7066570), (5, 5653256), (7, 4038040), (8, 3533285), (10, 2826628), (14, 2019020), (20, 1413314), (28, 1009510), (35, 807608), (40, 706657), (56, 504755), (70, 403804), (140, 201902), (157, 180040), (280, 100951), (314, 90020), (628, 45010), (643, 43960), (785, 36008), (1099, 25720), (1256, 22505), (1286, 21980), (1570, 18004), (2198, 12860), (2572, 10990), (3140, 9002), (3215, 8792), (4396, 6430), (4501, 6280), (5144, 5495)]