20007920

素因数分解:

$2^4\times 5^1\times {\mathrm{383}}^1\times {\mathrm{653}}^1$

素因数の和:1049

約数の個数: 40

約数和(自身を含む): 46711296

約数和(自身を除く): 26703376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 383, 653, 766, 1306, 1532, 1915, 2612, 3064, 3265, 3830, 5224, 6128, 6530, 7660, 10448, 13060, 15320, 26120, 30640, 52240, 250099, 500198, 1000396, 1250495, 2000792, 2500990, 4001584, 5001980, 10003960, 20007920]

約数ペア:

[(1, 20007920), (2, 10003960), (4, 5001980), (5, 4001584), (8, 2500990), (10, 2000792), (16, 1250495), (20, 1000396), (40, 500198), (80, 250099), (383, 52240), (653, 30640), (766, 26120), (1306, 15320), (1532, 13060), (1915, 10448), (2612, 7660), (3064, 6530), (3265, 6128), (3830, 5224)]