128945560

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{8039}}^1$

素因数の和:8451

約数の個数: 32

約数和(自身を含む): 290887200

約数和(自身を除く): 161941640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 8020, 8039, 16040, 16078, 32156, 40195, 64312, 80390, 160780, 321560, 3223639, 6447278, 12894556, 16118195, 25789112, 32236390, 64472780, 128945560]

約数ペア:

[(1, 128945560), (2, 64472780), (4, 32236390), (5, 25789112), (8, 16118195), (10, 12894556), (20, 6447278), (40, 3223639), (401, 321560), (802, 160780), (1604, 80390), (2005, 64312), (3208, 40195), (4010, 32156), (8020, 16078), (8039, 16040)]