20285820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{449}}^1$

素因数の和:715

約数の個数: 72

約数和(自身を含む): 61916400

約数和(自身を除く): 41630580

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 251, 449, 502, 753, 898, 1004, 1255, 1347, 1506, 1796, 2245, 2259, 2510, 2694, 3012, 3765, 4041, 4490, 4518, 5020, 5388, 6735, 7530, 8082, 8980, 9036, 11295, 13470, 15060, 16164, 20205, 22590, 26940, 40410, 45180, 80820, 112699, 225398, 338097, 450796, 563495, 676194, 1014291, 1126990, 1352388, 1690485, 2028582, 2253980, 3380970, 4057164, 5071455, 6761940, 10142910, 20285820]

約数ペア:

[(1, 20285820), (2, 10142910), (3, 6761940), (4, 5071455), (5, 4057164), (6, 3380970), (9, 2253980), (10, 2028582), (12, 1690485), (15, 1352388), (18, 1126990), (20, 1014291), (30, 676194), (36, 563495), (45, 450796), (60, 338097), (90, 225398), (180, 112699), (251, 80820), (449, 45180), (502, 40410), (753, 26940), (898, 22590), (1004, 20205), (1255, 16164), (1347, 15060), (1506, 13470), (1796, 11295), (2245, 9036), (2259, 8980), (2510, 8082), (2694, 7530), (3012, 6735), (3765, 5388), (4041, 5020), (4490, 4518)]