19810175

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 31497984

約数和(自身を除く): 11687809

約数列:

[1, 5, 7, 11, 25, 35, 41, 55, 77, 175, 205, 251, 275, 287, 385, 451, 1025, 1255, 1435, 1757, 1925, 2255, 2761, 3157, 6275, 7175, 8785, 10291, 11275, 13805, 15785, 19327, 43925, 51455, 69025, 72037, 78925, 96635, 113201, 257275, 360185, 483175, 566005, 792407, 1800925, 2830025, 3962035, 19810175]

約数ペア:

[(1, 19810175), (5, 3962035), (7, 2830025), (11, 1800925), (25, 792407), (35, 566005), (41, 483175), (55, 360185), (77, 257275), (175, 113201), (205, 96635), (251, 78925), (275, 72037), (287, 69025), (385, 51455), (451, 43925), (1025, 19327), (1255, 15785), (1435, 13805), (1757, 11275), (1925, 10291), (2255, 8785), (2761, 7175), (3157, 6275)]