20682400

素因数分解:

$2^5\times 5^2\times {\mathrm{103}}^1\times {\mathrm{251}}^1$

素因数の和:374

約数の個数: 72

約数和(自身を含む): 51184224

約数和(自身を除く): 30501824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 103, 160, 200, 206, 251, 400, 412, 502, 515, 800, 824, 1004, 1030, 1255, 1648, 2008, 2060, 2510, 2575, 3296, 4016, 4120, 5020, 5150, 6275, 8032, 8240, 10040, 10300, 12550, 16480, 20080, 20600, 25100, 25853, 40160, 41200, 50200, 51706, 82400, 100400, 103412, 129265, 200800, 206824, 258530, 413648, 517060, 646325, 827296, 1034120, 1292650, 2068240, 2585300, 4136480, 5170600, 10341200, 20682400]

約数ペア:

[(1, 20682400), (2, 10341200), (4, 5170600), (5, 4136480), (8, 2585300), (10, 2068240), (16, 1292650), (20, 1034120), (25, 827296), (32, 646325), (40, 517060), (50, 413648), (80, 258530), (100, 206824), (103, 200800), (160, 129265), (200, 103412), (206, 100400), (251, 82400), (400, 51706), (412, 50200), (502, 41200), (515, 40160), (800, 25853), (824, 25100), (1004, 20600), (1030, 20080), (1255, 16480), (1648, 12550), (2008, 10300), (2060, 10040), (2510, 8240), (2575, 8032), (3296, 6275), (4016, 5150), (4120, 5020)]