1281090100

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^2\times {\mathrm{7621}}^1$

素因数の和:7717

約数の個数: 54

約数和(自身を含む): 2849797202

約数和(自身を除く): 1568707102

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 1681, 2050, 3362, 4100, 6724, 7621, 8405, 15242, 16810, 30484, 33620, 38105, 42025, 76210, 84050, 152420, 168100, 190525, 312461, 381050, 624922, 762100, 1249844, 1562305, 3124610, 6249220, 7811525, 12810901, 15623050, 25621802, 31246100, 51243604, 64054505, 128109010, 256218020, 320272525, 640545050, 1281090100]

約数ペア:

[(1, 1281090100), (2, 640545050), (4, 320272525), (5, 256218020), (10, 128109010), (20, 64054505), (25, 51243604), (41, 31246100), (50, 25621802), (82, 15623050), (100, 12810901), (164, 7811525), (205, 6249220), (410, 3124610), (820, 1562305), (1025, 1249844), (1681, 762100), (2050, 624922), (3362, 381050), (4100, 312461), (6724, 190525), (7621, 168100), (8405, 152420), (15242, 84050), (16810, 76210), (30484, 42025), (33620, 38105)]