20575280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{227}}^1$

素因数の和:354

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 32349904

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 103, 110, 176, 206, 220, 227, 412, 440, 454, 515, 824, 880, 908, 1030, 1133, 1135, 1648, 1816, 2060, 2266, 2270, 2497, 3632, 4120, 4532, 4540, 4994, 5665, 8240, 9064, 9080, 9988, 11330, 12485, 18128, 18160, 19976, 22660, 23381, 24970, 39952, 45320, 46762, 49940, 90640, 93524, 99880, 116905, 187048, 199760, 233810, 257191, 374096, 467620, 514382, 935240, 1028764, 1285955, 1870480, 2057528, 2571910, 4115056, 5143820, 10287640, 20575280]

約数ペア:

[(1, 20575280), (2, 10287640), (4, 5143820), (5, 4115056), (8, 2571910), (10, 2057528), (11, 1870480), (16, 1285955), (20, 1028764), (22, 935240), (40, 514382), (44, 467620), (55, 374096), (80, 257191), (88, 233810), (103, 199760), (110, 187048), (176, 116905), (206, 99880), (220, 93524), (227, 90640), (412, 49940), (440, 46762), (454, 45320), (515, 39952), (824, 24970), (880, 23381), (908, 22660), (1030, 19976), (1133, 18160), (1135, 18128), (1648, 12485), (1816, 11330), (2060, 9988), (2266, 9080), (2270, 9064), (2497, 8240), (3632, 5665), (4120, 4994), (4532, 4540)]