208000400

素因数分解:

$2^4\times 5^2\times {\mathrm{331}}^1\times {\mathrm{1571}}^1$

素因数の和:1920

約数の個数: 60

約数和(自身を含む): 501549744

約数和(自身を除く): 293549344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 331, 400, 662, 1324, 1571, 1655, 2648, 3142, 3310, 5296, 6284, 6620, 7855, 8275, 12568, 13240, 15710, 16550, 25136, 26480, 31420, 33100, 39275, 62840, 66200, 78550, 125680, 132400, 157100, 314200, 520001, 628400, 1040002, 2080004, 2600005, 4160008, 5200010, 8320016, 10400020, 13000025, 20800040, 26000050, 41600080, 52000100, 104000200, 208000400]

約数ペア:

[(1, 208000400), (2, 104000200), (4, 52000100), (5, 41600080), (8, 26000050), (10, 20800040), (16, 13000025), (20, 10400020), (25, 8320016), (40, 5200010), (50, 4160008), (80, 2600005), (100, 2080004), (200, 1040002), (331, 628400), (400, 520001), (662, 314200), (1324, 157100), (1571, 132400), (1655, 125680), (2648, 78550), (3142, 66200), (3310, 62840), (5296, 39275), (6284, 33100), (6620, 31420), (7855, 26480), (8275, 25136), (12568, 16550), (13240, 15710)]