81688100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2027}}^1$

素因数の和:2085

約数の個数: 72

約数和(自身を含む): 197154048

約数和(自身を除く): 115465948

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 50, 52, 62, 65, 100, 124, 130, 155, 260, 310, 325, 403, 620, 650, 775, 806, 1300, 1550, 1612, 2015, 2027, 3100, 4030, 4054, 8060, 8108, 10075, 10135, 20150, 20270, 26351, 40300, 40540, 50675, 52702, 62837, 101350, 105404, 125674, 131755, 202700, 251348, 263510, 314185, 527020, 628370, 658775, 816881, 1256740, 1317550, 1570925, 1633762, 2635100, 3141850, 3267524, 4084405, 6283700, 8168810, 16337620, 20422025, 40844050, 81688100]

約数ペア:

[(1, 81688100), (2, 40844050), (4, 20422025), (5, 16337620), (10, 8168810), (13, 6283700), (20, 4084405), (25, 3267524), (26, 3141850), (31, 2635100), (50, 1633762), (52, 1570925), (62, 1317550), (65, 1256740), (100, 816881), (124, 658775), (130, 628370), (155, 527020), (260, 314185), (310, 263510), (325, 251348), (403, 202700), (620, 131755), (650, 125674), (775, 105404), (806, 101350), (1300, 62837), (1550, 52702), (1612, 50675), (2015, 40540), (2027, 40300), (3100, 26351), (4030, 20270), (4054, 20150), (8060, 10135), (8108, 10075)]