20929975

素因数分解:

$5^2\times {\mathrm{11}}^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1$

素因数の和:97

約数の個数: 48

約数和(自身を含む): 31042656

約数和(自身を除く): 10112681

約数列:

[1, 5, 11, 17, 25, 37, 55, 85, 121, 185, 187, 275, 407, 425, 605, 629, 925, 935, 1331, 2035, 2057, 3025, 3145, 4477, 4675, 6655, 6919, 10175, 10285, 15725, 22385, 22627, 33275, 34595, 49247, 51425, 76109, 111925, 113135, 172975, 246235, 380545, 565675, 837199, 1231175, 1902725, 4185995, 20929975]

約数ペア:

[(1, 20929975), (5, 4185995), (11, 1902725), (17, 1231175), (25, 837199), (37, 565675), (55, 380545), (85, 246235), (121, 172975), (185, 113135), (187, 111925), (275, 76109), (407, 51425), (425, 49247), (605, 34595), (629, 33275), (925, 22627), (935, 22385), (1331, 15725), (2035, 10285), (2057, 10175), (3025, 6919), (3145, 6655), (4477, 4675)]