28991875

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{4217}}^1$

素因数の和:4248

約数の個数: 20

約数和(自身を含む): 39531096

約数和(自身を除く): 10539221

約数列:

[1, 5, 11, 25, 55, 125, 275, 625, 1375, 4217, 6875, 21085, 46387, 105425, 231935, 527125, 1159675, 2635625, 5798375, 28991875]

約数ペア:

[(1, 28991875), (5, 5798375), (11, 2635625), (25, 1159675), (55, 527125), (125, 231935), (275, 105425), (625, 46387), (1375, 21085), (4217, 6875)]