81239725

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{461}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 123742080

約数和(自身を除く): 42502355

約数列:

[1, 5, 7, 19, 25, 35, 53, 95, 133, 175, 265, 371, 461, 475, 665, 1007, 1325, 1855, 2305, 3227, 3325, 5035, 7049, 8759, 9275, 11525, 16135, 24433, 25175, 35245, 43795, 61313, 80675, 122165, 171031, 176225, 218975, 306565, 464227, 610825, 855155, 1532825, 2321135, 3249589, 4275775, 11605675, 16247945, 81239725]

約数ペア:

[(1, 81239725), (5, 16247945), (7, 11605675), (19, 4275775), (25, 3249589), (35, 2321135), (53, 1532825), (95, 855155), (133, 610825), (175, 464227), (265, 306565), (371, 218975), (461, 176225), (475, 171031), (665, 122165), (1007, 80675), (1325, 61313), (1855, 43795), (2305, 35245), (3227, 25175), (3325, 24433), (5035, 16135), (7049, 11525), (8759, 9275)]