20981520400

素因数分解:

$2^4\times 5^2\times {\mathrm{41}}^1\times {\mathrm{1279361}}^1$

素因数の和:1279420

約数の個数: 60

約数和(自身を含む): 51637609044

約数和(自身を除く): 30656088644

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 164, 200, 205, 328, 400, 410, 656, 820, 1025, 1640, 2050, 3280, 4100, 8200, 16400, 1279361, 2558722, 5117444, 6396805, 10234888, 12793610, 20469776, 25587220, 31984025, 51174440, 52453801, 63968050, 102348880, 104907602, 127936100, 209815204, 255872200, 262269005, 419630408, 511744400, 524538010, 839260816, 1049076020, 1311345025, 2098152040, 2622690050, 4196304080, 5245380100, 10490760200, 20981520400]

約数ペア:

[(1, 20981520400), (2, 10490760200), (4, 5245380100), (5, 4196304080), (8, 2622690050), (10, 2098152040), (16, 1311345025), (20, 1049076020), (25, 839260816), (40, 524538010), (41, 511744400), (50, 419630408), (80, 262269005), (82, 255872200), (100, 209815204), (164, 127936100), (200, 104907602), (205, 102348880), (328, 63968050), (400, 52453801), (410, 51174440), (656, 31984025), (820, 25587220), (1025, 20469776), (1640, 12793610), (2050, 10234888), (3280, 6396805), (4100, 5117444), (8200, 2558722), (16400, 1279361)]