81384875

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1$

素因数の和:225

約数の個数: 64

約数和(自身を含む): 124225920

約数和(自身を除く): 42841045

約数列:

[1, 5, 11, 13, 25, 29, 55, 65, 125, 143, 145, 157, 275, 319, 325, 377, 715, 725, 785, 1375, 1595, 1625, 1727, 1885, 2041, 3575, 3625, 3925, 4147, 4553, 7975, 8635, 9425, 10205, 17875, 19625, 20735, 22451, 22765, 39875, 43175, 47125, 50083, 51025, 59189, 103675, 112255, 113825, 215875, 250415, 255125, 295945, 518375, 561275, 569125, 651079, 1252075, 1479725, 2806375, 3255395, 6260375, 7398625, 16276975, 81384875]

約数ペア:

[(1, 81384875), (5, 16276975), (11, 7398625), (13, 6260375), (25, 3255395), (29, 2806375), (55, 1479725), (65, 1252075), (125, 651079), (143, 569125), (145, 561275), (157, 518375), (275, 295945), (319, 255125), (325, 250415), (377, 215875), (715, 113825), (725, 112255), (785, 103675), (1375, 59189), (1595, 51025), (1625, 50083), (1727, 47125), (1885, 43175), (2041, 39875), (3575, 22765), (3625, 22451), (3925, 20735), (4147, 19625), (4553, 17875), (7975, 10205), (8635, 9425)]