20790825

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{79}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 39580800

約数和(自身を除く): 18789975

約数列:

[1, 3, 5, 11, 15, 25, 29, 33, 55, 75, 79, 87, 121, 145, 165, 237, 275, 319, 363, 395, 435, 605, 725, 825, 869, 957, 1185, 1595, 1815, 1975, 2175, 2291, 2607, 3025, 3509, 4345, 4785, 5925, 6873, 7975, 9075, 9559, 10527, 11455, 13035, 17545, 21725, 23925, 25201, 28677, 34365, 47795, 52635, 57275, 65175, 75603, 87725, 126005, 143385, 171825, 238975, 263175, 277211, 378015, 630025, 716925, 831633, 1386055, 1890075, 4158165, 6930275, 20790825]

約数ペア:

[(1, 20790825), (3, 6930275), (5, 4158165), (11, 1890075), (15, 1386055), (25, 831633), (29, 716925), (33, 630025), (55, 378015), (75, 277211), (79, 263175), (87, 238975), (121, 171825), (145, 143385), (165, 126005), (237, 87725), (275, 75603), (319, 65175), (363, 57275), (395, 52635), (435, 47795), (605, 34365), (725, 28677), (825, 25201), (869, 23925), (957, 21725), (1185, 17545), (1595, 13035), (1815, 11455), (1975, 10527), (2175, 9559), (2291, 9075), (2607, 7975), (3025, 6873), (3509, 5925), (4345, 4785)]