20997850

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:116

約数の個数: 72

約数和(自身を含む): 44327520

約数和(自身を除く): 23329670

約数列:

[1, 2, 5, 10, 19, 23, 25, 31, 38, 46, 50, 62, 95, 115, 155, 190, 230, 310, 437, 475, 575, 589, 713, 775, 874, 950, 961, 1150, 1178, 1426, 1550, 1922, 2185, 2945, 3565, 4370, 4805, 5890, 7130, 9610, 10925, 13547, 14725, 17825, 18259, 21850, 22103, 24025, 27094, 29450, 35650, 36518, 44206, 48050, 67735, 91295, 110515, 135470, 182590, 221030, 338675, 419957, 456475, 552575, 677350, 839914, 912950, 1105150, 2099785, 4199570, 10498925, 20997850]

約数ペア:

[(1, 20997850), (2, 10498925), (5, 4199570), (10, 2099785), (19, 1105150), (23, 912950), (25, 839914), (31, 677350), (38, 552575), (46, 456475), (50, 419957), (62, 338675), (95, 221030), (115, 182590), (155, 135470), (190, 110515), (230, 91295), (310, 67735), (437, 48050), (475, 44206), (575, 36518), (589, 35650), (713, 29450), (775, 27094), (874, 24025), (950, 22103), (961, 21850), (1150, 18259), (1178, 17825), (1426, 14725), (1550, 13547), (1922, 10925), (2185, 9610), (2945, 7130), (3565, 5890), (4370, 4805)]