21154375

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:229

約数の個数: 40

約数和(自身を含む): 30702672

約数和(自身を除く): 9548297

約数列:

[1, 5, 11, 17, 25, 55, 85, 125, 181, 187, 275, 425, 625, 905, 935, 1375, 1991, 2125, 3077, 4525, 4675, 6875, 9955, 10625, 15385, 22625, 23375, 33847, 49775, 76925, 113125, 116875, 169235, 248875, 384625, 846175, 1244375, 1923125, 4230875, 21154375]

約数ペア:

[(1, 21154375), (5, 4230875), (11, 1923125), (17, 1244375), (25, 846175), (55, 384625), (85, 248875), (125, 169235), (181, 116875), (187, 113125), (275, 76925), (425, 49775), (625, 33847), (905, 23375), (935, 22625), (1375, 15385), (1991, 10625), (2125, 9955), (3077, 6875), (4525, 4675)]