18479725

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:222

約数の個数: 36

約数和(自身を含む): 25974900

約数和(自身を除く): 7495175

約数列:

[1, 5, 11, 25, 41, 55, 121, 149, 205, 275, 451, 605, 745, 1025, 1639, 2255, 3025, 3725, 4961, 6109, 8195, 11275, 18029, 24805, 30545, 40975, 67199, 90145, 124025, 152725, 335995, 450725, 739189, 1679975, 3695945, 18479725]

約数ペア:

[(1, 18479725), (5, 3695945), (11, 1679975), (25, 739189), (41, 450725), (55, 335995), (121, 152725), (149, 124025), (205, 90145), (275, 67199), (451, 40975), (605, 30545), (745, 24805), (1025, 18029), (1639, 11275), (2255, 8195), (3025, 6109), (3725, 4961)]