128733560

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{7681}}^1$

素因数の和:8111

約数の個数: 32

約数和(自身を含む): 290379600

約数和(自身を除く): 161646040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1676, 2095, 3352, 4190, 7681, 8380, 15362, 16760, 30724, 38405, 61448, 76810, 153620, 307240, 3218339, 6436678, 12873356, 16091695, 25746712, 32183390, 64366780, 128733560]

約数ペア:

[(1, 128733560), (2, 64366780), (4, 32183390), (5, 25746712), (8, 16091695), (10, 12873356), (20, 6436678), (40, 3218339), (419, 307240), (838, 153620), (1676, 76810), (2095, 61448), (3352, 38405), (4190, 30724), (7681, 16760), (8380, 15362)]