20155178725

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{1609}}^1$

素因数の和:1783

約数の個数: 72

約数和(自身を含む): 28437320520

約数和(自身を除く): 8282141795

約数列:

[1, 5, 11, 25, 41, 55, 101, 121, 205, 275, 451, 505, 605, 1025, 1111, 1609, 2255, 2525, 3025, 4141, 4961, 5555, 8045, 11275, 12221, 17699, 20705, 24805, 27775, 40225, 45551, 61105, 65969, 88495, 103525, 124025, 162509, 194689, 227755, 305525, 329845, 442475, 501061, 725659, 812545, 973445, 1138775, 1649225, 1787599, 2505305, 3628295, 4062725, 4867225, 6662869, 7982249, 8937995, 12526525, 18141475, 19663589, 33314345, 39911245, 44689975, 73291559, 98317945, 166571725, 199556225, 366457795, 491589725, 806207149, 1832288975, 4031035745, 20155178725]

約数ペア:

[(1, 20155178725), (5, 4031035745), (11, 1832288975), (25, 806207149), (41, 491589725), (55, 366457795), (101, 199556225), (121, 166571725), (205, 98317945), (275, 73291559), (451, 44689975), (505, 39911245), (605, 33314345), (1025, 19663589), (1111, 18141475), (1609, 12526525), (2255, 8937995), (2525, 7982249), (3025, 6662869), (4141, 4867225), (4961, 4062725), (5555, 3628295), (8045, 2505305), (11275, 1787599), (12221, 1649225), (17699, 1138775), (20705, 973445), (24805, 812545), (27775, 725659), (40225, 501061), (45551, 442475), (61105, 329845), (65969, 305525), (88495, 227755), (103525, 194689), (124025, 162509)]