128821250

素因数分解:

$2^1\times 5^4\times {\mathrm{257}}^1\times {\mathrm{401}}^1$

素因数の和:680

約数の個数: 40

約数和(自身を含む): 243006588

約数和(自身を除く): 114185338

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 257, 401, 514, 625, 802, 1250, 1285, 2005, 2570, 4010, 6425, 10025, 12850, 20050, 32125, 50125, 64250, 100250, 103057, 160625, 206114, 250625, 321250, 501250, 515285, 1030570, 2576425, 5152850, 12882125, 25764250, 64410625, 128821250]

約数ペア:

[(1, 128821250), (2, 64410625), (5, 25764250), (10, 12882125), (25, 5152850), (50, 2576425), (125, 1030570), (250, 515285), (257, 501250), (401, 321250), (514, 250625), (625, 206114), (802, 160625), (1250, 103057), (1285, 100250), (2005, 64250), (2570, 50125), (4010, 32125), (6425, 20050), (10025, 12850)]