81905884

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{353}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 157006080

約数和(自身を除く): 75100196

約数列:

[1, 2, 4, 19, 38, 43, 71, 76, 86, 142, 172, 284, 353, 706, 817, 1349, 1412, 1634, 2698, 3053, 3268, 5396, 6106, 6707, 12212, 13414, 15179, 25063, 26828, 30358, 50126, 58007, 60716, 100252, 116014, 232028, 288401, 476197, 576802, 952394, 1077709, 1153604, 1904788, 2155418, 4310836, 20476471, 40952942, 81905884]

約数ペア:

[(1, 81905884), (2, 40952942), (4, 20476471), (19, 4310836), (38, 2155418), (43, 1904788), (71, 1153604), (76, 1077709), (86, 952394), (142, 576802), (172, 476197), (284, 288401), (353, 232028), (706, 116014), (817, 100252), (1349, 60716), (1412, 58007), (1634, 50126), (2698, 30358), (3053, 26828), (3268, 25063), (5396, 15179), (6106, 13414), (6707, 12212)]